Wednesday, May 6, 2020
stress log Essay - 870 Words
Psychology Stress Log Assignment 1) On july 27, 2011 my mother passed away from colon cancer. From that day on I think I was introduced to stress. Before my mom passed I was a free bird. I was a happy person when certain problems came my way I was able to brush them off and push them to the side, Loosing my mother had changed me in so many ways emotionally and physically. My stress level was high I was emotional, Il get upset easily over small things, and I didnt look happy. At times when I looked in mirror I would look in the mirror i would see an permanent angry look on my face. My moms passingI felt worthless, I no longer had any hope for anything. I would questionâ⬠¦show more contentâ⬠¦After high school I was somewhat active I became lazier as the years went by. Now as I a 26 yea rs, I dont exercise at all. Exercising and eating healthy isnt an option. As far as my eating habits, I dont watch what eat or eat healthy. Whatever comes to mind is what i eat. When Im stressed im the to type to go out to a night club with my friends and party. My night with my friends involves alcohol which makes me forget my problems and eases the stress. Going out partying can become an all nighter, Im out all night when i know I have to work in the morning and it affects how much sleep im getting which is not so much. 4) My thoughts when Im stressed were always negative, I felt like I had an enemy inside of me. It made my stress worst for me because I became more angry. Anything that was positive or a happy moment I would shut it down with a negative thought and ill began to think about my mom and remind my self that shes gone thats when stress would come back around. It always felt like my thoughts were competitive. 5) My feeling made the stress worst for me because I felt so hurt. At times I would sit alone in my room where its dark and just cry myself to sleep. I became distant and just wanted to be alone, I was in grief nothing seemed important to me. Waking up everyday knowing your mom is gone, and you cant see her made me more stressed out. I know i wasnt okay mentally and I wasShow MoreRelatedStress Management Weekly Log Example1266 Words à |à 6 Pagesagree that its not the hours that we work that causes stress but how we spend the hours. Dealing with angry customers for an hour is more stressful than helping happy ones for five hours. Someone will get more benefit out of rigorously studying material for a short period of time versus leasurley studying with friends all day. In the end, you are going to be more stressed about your test if you have not been dedicated to your studying. Stress has somewhat of a correlation with how many hours youRead MoreNotes On Time Management Progress1539 Words à |à 7 PagesReflection #2 Student Name: What? (Time Management Progress) What is my Time Management progress to date? 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Whether itââ¬â¢s busting out a research paper for Psychology at the last minute, expecting your first child to be born, to making sure youââ¬â¢re up in time to catch the Saturday morning cartoons, itââ¬â¢s clearly evident that everyone goes through stress. The real question is, how is stress handled in our society? A person is defined by how theyRead MoreThe Impact of Stress on Health Essay2044 Word s à |à 9 Pages à à à à People seeking a higher education are under extreme stress and dont even realize it. They are dealing with the high cost of a college education and are being pressured to quickly get through college and into the workforce. Many students are working extra jobs to help pay for their tuition while still taking a full load of courses. They have their time and resources stretched so thin that they find it hard to manage college life. Many people attending college are suffering from poorRead MoreMyself7546 Words à |à 31 PagesJollllllli of Educational Psychology 1990, Vol. 82, No. 4, 760-768 Copyright 199() by the American Psychological Association, Inc. 0022-0663/90/$00.7S College Students Time Management: Correlations With Academic Performance and Stress Therese Hoff Macan University of Missouri-St. Louis Cornila Shahani Hofstra University Robert L. Dipboye and Amanda Peek Phillips Rice University Many college students may find the academic experience very stressful Read MoreProject on Stress Management9684 Words à |à 39 PagesCHP:1 INTRODUCTION What is Stress? Stress is a complex phenomenon. It has been defined in many ways, but simply put; it is the wear and tear of everyday life. In everydayââ¬â¢s life people are subjected to a wide range of pressures. Similarly there are also a wide range of resources and strategies for coping with pressure. Sometimes people cope well and will not feel that the pressure is having any adverse effect upon them. At other times they will have difficulty in dealing with theRead MoreThe Effect Of Stress On Mental And Physical Health1584 Words à |à 7 PagesIn order to develop techniques to manage stress, you must first understand what contributes to stress. Stress is the bodyââ¬â¢s reaction to your environment that impacts the balance of your physical or mental being. Stress is the same for the body whether considered positive or negative. It elicits the same body responses for emotion and motivation whether it is from competitive sports or a near miss on the freeway. Emotion and motivation are the two fundamental components of affect. They guideRead MoreStress Lesson Pl The Stress Reduction Technique Essa y1073 Words à |à 5 PagesSPH-H180- Stress Management- Lesson Plan Name: (Last, First)_Yuchan Hu__ Fill out your lesson plan and PRINT. You will hand-deliver to me on 12/1. 1. What stress reduction technique did you choose to teach someone else? I chose the time management as the stress reduction technique to teach my roommate. 2. Why did you choose this topic? I chose this topic because I know that my roommate is a student who is confused by her procrastination. She often postpones complete learning tasks although
Online Shopping Versus in Store Free Essays
If a person decides to make the purchases of an item online there are a few facts that should be realized. In the economy that todayââ¬â¢s society is in savings is a big deal for most. When shopping online the shopper will be required to purchase their items with credit cards. We will write a custom essay sample on Online Shopping Versus in Store or any similar topic only for you Order Now Credit cards can be very convenient a shopper however, they come with payments and interest. When calculated out a shopper can look at 10 percent on purchases made. Knowing this and how long it can take to pay debt off may make a person think twice about the purchases that are made. On average 5,000 dollars will take 10 years to payoff. Once the shopper has ordered the Items shipping will be estimated. One transaction online can cost a person an extra 10 Lars In shipping, followed by at least 10 dollars In a small purchase for Interest on the credit card. The shopper also has the choice to go Into the stores to make the purchases needed. These purchases can be made with a variety of payments including cash, gift cards as well as credit cards. Most people know how much they are willing to spend on an item and very seldom want to spend more. If a going into a store with cash you are ensured you will not spend more, or incur any hidden fees. When paying with cash it can be asked if a discount is available, a person would be pleasantly surprised at the savings offered. In store shopping offers other means of savings as well, coupons are a big tool that stores supply to have the public come into their establishments. Now if a company like Kohlââ¬â¢s for Instance offers additional savings If a credit card Is used, once again the shopper Is saving usually an additional 15 percent. The trick to shopping In stores with credit cards Is to turn around and make the payment right there Is In the store. This would require that the customer had the intention of paying with cash to save money, and in the end this would save a customer even more than thought of in the beginning. More thought should go into why one would choose not to shop online versus shopping in the store. Today the country is seeing a lack in jobs, and people needing work. For every purchase a person makes online it is taking more jobs away. Shopping online one does not need a sales clerk, cashier, janitor, supervisor, and manager to make the purchases. All one needs is to have access to the Internet, and fingers. Placing orders online also can take away from local vendors, not Just corporations. If online most likely you will be ordering from companies that purchase teems from overseas, yet again taking money away from the American economy. Now if shopping for electronics Is what a person Is doing corporate shopping will be needed; however, doing It online takes more Jobs away. When thinking about making a purchase for a television most would only think tout want ten Test price Is Tanat can De Taunt. IT ten economy were outing tout a few things would cross the mind of an individual. One big item is if the store wasnââ¬â¢t open it would be an empty building, owner looses money, electric company looses money, and the people that would normally work there are trying to find a Job amongst all the other Americans. Going out shopping in person can offer a great deal of benefits too community. This allows the shopper to purchase locally grown and locally made items. When thinking that corporate gifts are needed for Christmas or birthdaysââ¬â¢ people can think out of the box and get creative. How many people would want to receive a massage, car wash, oil change? These are all options for in store shopping, thus keeping money in the local economy. Shopping online can also bring up a few worries will the item fit will it match, or will it live up to expectations of the purchaser? When ordering clothing online a errors does not get to try on the clothes, this leaves one hoping it is going to fit correctly and the way it was expected to fit. If a person decides that the bathroom needs to be redecorated and spends four hundred dollars online doing this, gets the items in the mail to be upset that it does not match as well to the tile. Problems like this can occur at anytime when the items are not seen in person. In order for a one to be sure that what is wanted is what one gets it is best to use the senses in making the purchase. To use senses in making a purchase being present is required. This would even go for purchasing a television, seeing the efferent screens on will help a shopper to decide which one would be best. If wanting to purchase a new dress trying it on will show rather the look is what is wanted or not. The same theory applies to making purchases for a home, the items can be brought in and placed where it is wanted and then decided upon if it should stay or go back to the store for a replacement. Questions can now be asked knowing the differences on the two forms when deciding which form is best for the shopper. When deciding to make a purchase each person will need to decide what matters most, convenience or helping to boost he economy, and staying local with each purchase. How to cite Online Shopping Versus in Store, Papers
Chick Webb The Drummer free essay sample
In a genre as widely popular and influential as Jazz, even some of the most well- respected musicians could fall through the cracks in terms of being a mainstream legend. This is not a revelation of a statement on its own, as this was the story for many a musician. The cause could be simply be a casualty of overshadowing during the jazz/swing craze, not being terribly Innovative, or not having a string of hits. Some of these causes even afflicted the subject of this paper. However, It was another factor that makes his story so interesting, yet tragic.Not every artist could be etched In legend such as figures like Louis Armstrong and Duke Longtime, or have his music played all over like Benny Goodman. But Chick Webs Impact on both the music, culture and technique regarding the drums were and still are well-respected In the Jazz scene, despite some of the factors that would hold him back from being a transcendent star. The story of Chick Webb has to begin with the factor that held him back the most and is also the first to afflict him.Despite his disputed birth date, Chick was born in Baltimore, Maryland to William H. And Marie Johnson Webb. William Henry Webb, his birth name, was born with spinal tuberculosis, a condition that would negatively affect him his whole life and ultimately cost him his life. So how does one manage all this pain, let alone become the greatest jazz drummer in history? For starters, the idea of playing the drums came from his doctor. The intent was that the rapid movement of the limbs that is required by the drums would loosen up his stiff limbs and lessen the pain.With the appeal of the instruments recreational and medicinal apparent, a young Webb would become a newspaper boy with the sole goal of saving up enough money to buy a drum set. Until then, Webb would settle for the bottom of overturned garbage cans to whet his appetite. By 1 1 years old, Webb would have his drum set and by 17 years old, he had moved to New York City to pursue his dream of being a player in the Jazz capital of the world. Chick Webb began playing in New York night clubs as soon as he arrived in 1924.Clubs such as the Paddock Club and the Black Bottom took him in, reference by none other than Duke Longtime, who instantly recognized his talent. Longtime would become an Important figure in Webs life, both as a mentor and a rival, further down the line. Noting his dominant skill and strong personality, Longtime would encourage Webb to form and lead his own small band. Webb would do Just that by forming the Harlem Stoppers, a quintet that would go on to supply the demand for swing music In the era known as the Harlem Renaissance.HIS skills were rare, and considered Ideal to fuel the upbeat pace of swing music and provide a drive to the music that could rarely be matched. Naturally, this skill became quickly recognized all over the city, leading to the expansion of the Harlem Stoppers, who would now be known as the Chick Webb Orchestra. Webs status as a successful musicals was cemented when his band was selected as the house band of the Savoy Ballroom, a legendary venue located In Harlem. He would be the face of the venue until his final years. Based solely off their own merits, the Chick Webb Orchestra was a highly regarded band.But what made the band legendary in its own right was their willingness to accept challengers in what was known as cutting sessions, or battles of the bands. Many good, but be blown out of the ballroom. However, when then-King of Swing Benny Goodman and his band arrived to challenge Webs, Chick began to finally get some acclaim room outside of New York. In New York, over 9,000 people came to see this historical event, 5,000 of them standing outside Just to have the chance of possibly hearing the monumental clash that was to take place. And when the opportunity arose for Webb and his band to make a statement, they did so in force.Performing first, Goodman orchestra performed honorably as many expected from a unit of their stature. But when Webs crew began, the outcome would become obvious. With the roar of the crowd Webs orchestra, they would end up blowing Benny Goodman band out of he ballroom Just as he did all the other bands before him that challenged him. His driving sounds often over-powered other bands, playing into the hard swing of his orchestra. Gene Koura, a legendary drummer in his own right and drummer for Goodman band noted that Webb cut me to ribbons! It was this moment where Webb was crowned King of Swing and undoubtedly King of the Savoy. Other legendary challengers such as Count Basis (who played Webb to a draw at the very least), Fletcher Henderson and Duke Longtime would test the mettle of the Chick Webb Orchestra, but none would diminish his status as one of the preeminent kneaders and musicians of the time. Like most famous musicians of the time, Webb began to record his work, beginning in 1927. However, his powerful sound was difficult to record cleanly without drowning out the full com position of the work. This forced him to tone down his sound and let the rest of the music even out, possibly lessening his fame. However, in circles within the music industry, Webs talent and influence did not go unnoticed. When Decca Records formed in 1934, Webb signed to the label and made his most famous recordings, almost all of which featuring Ella Fitzgerald as the singer. Webb initially discouraged the inclusion of Fitzgerald as she did not fit the image of the typical lead vocalist for a swing band. However, once he heard her voice, she would become the lead vocalist for Chick Webs Orchestra.This addition skyrocketed the careers of both artist, transforming Fitzgerald into a Boniface superstar following the success of their top hit together, Fitzgerald rendition of A-ticket, A-Tasked. As the quintessential swing artist, Webs sound merged perfectly with Fitzgerald, so much so that she became known as the First Lady of Swing. Unfortunately, one could say the vast popularity of Fitzgerald would often overshadow Webb, especially true on recordings. What made it worse for Chick Webb, was the timing of his newfound popularity.
Thursday, April 30, 2020
Zoology Lab Report Essay Example
Zoology Lab Report Paper Materials and Methods: Experiment #1: Before we did anything we punched fifteen discs out of the filter paper. Once we had our discs we then got our catalane, potato juice. We put it into small containers with lids with labels on them that read 100%, 80%, 60%, 40%, 20% and 0%. Each container contained water and potato juice. In the 100% it contained ml of catalane and Mol of water. In the 80% it contained ml of catalane and ml of water. In the 60% it contained ml of catalane and ml of water. In the 40% it contained ml of catalane and ml of water. In the it contained ml of catalane and ml of water. Lastly, in the 0% it contained ml of catalane and ml of water. Once we had our catalane ready we poured hydrogen peroxide in a graduated cylinder to the top. We got our timer ready and then we began our experiment. First we did the 0% catalane. We grabbed the edge of one of the filter paper discs and dipped it into the 0% catalane and then dropped it into the graduated cylinder containing the hydrogen peroxide. For the 0% catalane you had to wait three minutes because the disc would not go to the top. We then moved on the do the 20% catalane. We will write a custom essay sample on Zoology Lab Report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Zoology Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Zoology Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We dipped the filter paper disc into the catalane and then blotted it so there was no dripping of the catalane. We then roped it into the hydrogen peroxide and timed it until it reached the top of the graduated cylinder. We repeated this step three times for each of the catalysts. Once we had the times of all three trials you then calculated the average time. Once you had the average time you divided the distance in millimeters by the average time and that is what gave you your reaction rate. Experiment #2: First, before you do anything, you had to heat up the hydrogen peroxide to 80*C. You then used the same labeled containers with the catalane in it from experiment one. For our experiment we did our first trial at 70*C because our hydrogen peroxide dropped 10* before we could perform the experiment. First we dipped our filter disc into the 100% catalane and blotted it until there was no excess catalane on the disc and then we dropped it in the peroxide at 70*C. We timed how long it took to come up, but because the temperature is so hot you are just going to have to wait the three minutes again because it will not float up to the top. We then cooled our hydrogen peroxide down in the tub of ice to 50*C and dipped our filter paper disc into the 100% catalane, blotted it, and then dropped it into the hydrogen peroxide. We timed how long it took to reach the top as well. We then repeated this step for 40*C, 30*C and 20*C. Once we recorded the time and the distance for each one you then calculated the reaction time by dividing the time by the distance. IV. Results: % Catalane Time 3-friars (Sec. ) Average Time (Sec. ) Distance (mm) Reaction Rate (mm/sec) 100 47 As ass 45. As 44. As mm 2. Mm/s 80 56. S 48. Is ass 52. AS 2. Mm/s 60 ass 59. 75 ASS 56. AS 2. Mm/s ASS sass 104. As 98. AS 1. Mm/s 20 97. As 128. 85 SASS 110. As 1. Mm/s SASS sass Mom Mom/s Graph By the graph shown above the results we obtained from experiment one tell us hat the more enzyme concentration that is present the faster the reaction rate will be. This graph also supports my hypothesis because my hypothesis stated that I think the reaction would happ en faster, and in fact it did happen at a faster rate. Experiment 2: Data Table Temperature (*C) Time (sec) Reaction Rate (ms) 70*C 50*C 90. S mm 1. Mm/s 40*C 42. As 30*C 61. As 1. Mm/s 20*C 127. As 0. Mm/s Based on the graph above I can conclude from this experiment that the effect of temperature on the reaction rate is that the longer it takes the disc to rise causes a lower reaction because the enzyme proteins begin to denature. The graph above also showed some support for my hypothesis. I predicted that the filter discs would float sooner in a warmer substrate but once I looked at my graph above the reaction rate did get faster but when the temperature went up the filter discs didnt float at all. V. Discussion: The results for my experiment #1 supported my hypothesis. My hypothesis stated I think that the filter paper discs would float sooner when you add more enzymes, and when I plotted my line graph of my data it showed me that over time the reaction rate sped up when there were more enzymes present. The ERM 100% enzyme is relative only to the amount of enzyme our professor mixed, meaning that the enzyme concentration could have been a lot higher. I think that the trend of the graph would continue if the enzyme samples got even more concentrated than the ones in this lab because the graph showed us with more enzymes present the faster the reaction will be. If you were to set up a lab to test the effect of varying substrate concentration the student would first have to punch out the three holes of filter disc paper, just like we did, and put the hydrogen peroxide in a graduated cylinder. The student would then have to first oak the filter paper in the catalane until the filter paper was completely covered, then blot it on a paper towel to make sure there isnt any excess catalane. Then place the filter paper into the hydrogen peroxide and time how long it takes to reach the top of the cylinder. Once done calculate your reaction rate then repeat two more times for a more accurate reading. The results for my experiment #2 showed some support for my hypothesis. I predicted that the filter discs would float sooner in the warmer substrate, but when I plotted my graph it showed me that yes, when I heated up the substrate he reaction rate did get faster, but when the temperature got too hot the filter discs did not float at all. They did not float at all because if the enzymes are heated up to much it causes the enzymes bonds to break which would not allow them to bond to the substrate, causing the discs not to float. If you mixed up the enzyme solution and the substrate solution will cause the discs not to float because mixing them takes heat and energy away causing the reaction rate to go down. Also if you let an enzyme boil the heat breaks down the bonds that make up the enzyme and it loses its shape, which leads it to not being allowed to bond o the substrate.
Tuesday, April 14, 2020
Writing-Sample Essays - What to Avoid Writing
Writing-Sample Essays - What to Avoid WritingWhen you write a sample essay, it is important to understand that some of your content may get tweaked for every paper you write. That's just the way it is. Some of your information may be personal, some will be factual, and some may be anecdotal.Some of your content may be personal things, such as your own experiences or hobbies. Most of the time, the essay you write is going to be written for someone else. So when you're writing a sample essay, don't feel the need to add a lot of personal information.So how can you be sure that your content won't be edited for personal things? Make sure you have the name of the person you're writing for on your title page. This will help with spell check so that it doesn't take so long for your essay to be read.Another tip for avoiding personal information in your essay is to make sure you have several versions of your sample essay, one with a completely different version for each person you are writing for. You may find this makes things easier. This also gives you the opportunity to proofread the different versions until you find the errors you see.In order to make sure that everyone who reads your work will understand certain points, it's important to have a writing summary at the end of your essay. Using this brief summary will help explain your entire essay in one sentence, so that people will understand it easily.A lot of people think that they need to put their personal information all over their essays. The truth is that personal information is fine if it's related to your hobbies or experiences. But personal information can often cause people to read your essays too fast, which is not the best thing for the writer to do.So remember, personal information should only be used if it relates to your hobby or something that you've done for your hobbies. It's fine to use your hobbies in the introduction or the conclusion. Just make sure you do this because it will help speed up t he reading of your essay.That's the best way to write a sample essay. Write it in a way that will make it easy for others to understand. This way you'll be able to concentrate on the details of your essay, not what you're wearing.
Saturday, March 21, 2020
Free Essays on The Never Ending Night
In the autobiographical novel Night by Elie Wiesel, the young teenager Elie underwent the transformation from a boy who had faith and honored his God to a man who no longer believed in that God. Elie was a Jewish boy who lived in a small Hungarian town called Sighet, during World War II. When Elie was fifteen, Germans invaded Hungary and sent all his friends and family to concentration camps. During this devastating time in his life, Elie saw a great deal of inhuman deeds done to the Jews by the Germans and he started to lose faith in God. By the time he was finally liberated, he was starved, lost most of his family, and lost all faith in the Jewish God. There are many examples in the beginning of Night where people are trying to keep and strengthen their faith but there are many more examples of people rebelling against God and forgetting their religion. The first example of Elie loosing his faith is when he arrived at Auschwitz. Elie and his father are directed to go to the left. A prisoner then informs them that they are on their way to the crematory. Elieââ¬â¢s father recites the Kaddish or prayer for the dead. Revolt rises up inside of Elie and he questions God. ââ¬Å"Why should I bless His name? The Eternal, lord of the Universe, the All-Powerful and Terrible, was silent. What had I to thank Him for?â⬠(Wiesel 31). Another example of prisoners in the concentration camp loosing their faith in Night is when the pipel, a young child, was hung in front of the whole camp. The pipel was the Oberkapoââ¬â¢s servant. The Oberkapo was the leader of the fifty-second unit. He never struck or insulted the prisoners who worked under him ,that is why the prisoners loved him . Even though most pipels were cruel and hated, this one had the face of a sad angel and was loved by all. The Oberkapo was suspected in the intentional explosion of Bunaââ¬â¢s electric power station. He was transferred to Auschwitz but the pipel was left behind. The pipel refus... Free Essays on The Never Ending Night Free Essays on The Never Ending Night In the autobiographical novel Night by Elie Wiesel, the young teenager Elie underwent the transformation from a boy who had faith and honored his God to a man who no longer believed in that God. Elie was a Jewish boy who lived in a small Hungarian town called Sighet, during World War II. When Elie was fifteen, Germans invaded Hungary and sent all his friends and family to concentration camps. During this devastating time in his life, Elie saw a great deal of inhuman deeds done to the Jews by the Germans and he started to lose faith in God. By the time he was finally liberated, he was starved, lost most of his family, and lost all faith in the Jewish God. There are many examples in the beginning of Night where people are trying to keep and strengthen their faith but there are many more examples of people rebelling against God and forgetting their religion. The first example of Elie loosing his faith is when he arrived at Auschwitz. Elie and his father are directed to go to the left. A prisoner then informs them that they are on their way to the crematory. Elieââ¬â¢s father recites the Kaddish or prayer for the dead. Revolt rises up inside of Elie and he questions God. ââ¬Å"Why should I bless His name? The Eternal, lord of the Universe, the All-Powerful and Terrible, was silent. What had I to thank Him for?â⬠(Wiesel 31). Another example of prisoners in the concentration camp loosing their faith in Night is when the pipel, a young child, was hung in front of the whole camp. The pipel was the Oberkapoââ¬â¢s servant. The Oberkapo was the leader of the fifty-second unit. He never struck or insulted the prisoners who worked under him ,that is why the prisoners loved him . Even though most pipels were cruel and hated, this one had the face of a sad angel and was loved by all. The Oberkapo was suspected in the intentional explosion of Bunaââ¬â¢s electric power station. He was transferred to Auschwitz but the pipel was left behind. The pipel refus...
Wednesday, March 4, 2020
Understanding Quantum Optics
Understanding Quantum Optics Quantum optics is a field of quantum physics that deals specifically with the interaction of photons with matter. The study of individual photons is crucial to understanding the behavior of electromagnetic waves as a whole. To clarify exactly what this means, the word quantum refers to the smallest amount of any physical entity that can interact with another entity. Quantum physics, therefore, deals with the smallest particles; these are incredibly tiny sub-atomic particles which behave in unique ways. The word optics, in physics, refers to the study of light. Photons are the smallest particles of light (though it is important to know that photons can behave as both particles and waves). Development of Quantum Optics and the Photon Theory of Light The theory that light moved in discrete bundles (i.e. photons) was presented in Max Plancks 1900 paper on the ultraviolet catastrophe in black body radiation. In 1905, Einstein expanded on these principles in his explanation of the photoelectric effect to define the photon theory of light. Quantum physics developed through the first half of the twentieth century largely through work on our understanding of how photons and matter interact and inter-relate. This was viewed, however, as a study of the matter involved more than the light involved. In 1953, the maser was developed (which emitted coherent microwaves) and in 1960 the laser (which emitted coherent light). As the property of the light involved in these devices became more important, quantum optics began being used as the term for this specialized field of study. Findings Quantum optics (and quantum physics as a whole) views electromagnetic radiation as traveling in the form of both a wave and a particle at the same time. This phenomenon is called wave-particle duality. The most common explanation of how this works is that the photons move in a stream of particles, but the overall behavior of those particles is determined by a quantum wave function that determines the probability of the particles being in a given location at a given time. Taking findings from quantum electrodynamics (QED), it is also possible to interpret quantum optics in the form of the creation and annihilation of photons, described by field operators. This approach allows the use of certain statistical approaches that are useful in analyzing the behavior of light, although whether it represents what is physically taking place is a matter of some debate (although most people view it as just a useful mathematical model). Applications Lasers (and masers) are the most obvious application of quantum optics. Light emitted from these devices is in a coherent state, which means the light closely resembles a classical sinusoidal wave. In this coherent state, the quantum mechanical wave function (and thus the quantum mechanical uncertainty) is distributed equally. The light emitted from a laser is, therefore, highly ordered, and generally limited to essentially the same energy state (and thus the same frequency wavelength).
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