This website uses cookies to ensure you have the best experience.

# Aaaa Essay

2976 words - 12 pages

Thomas Young and the Wave Nature of Light Historical Background Isaac Newton was famous not only for formulating the laws of motion but also for pioneering in the study of optics. He used a prism to show that sunlight was a mixture of the colors that make up the rainbow. In his Opticks (1704), Newton argued that light was made up of tiny particles. Slightly earlier, the Dutch physicist Christiaan Huygens wrote a Treatise on light, in which he proposed that light was a wave. It was only in 1789 that Thomas Young proposed a simple experiment that appeared to resolve the controversy by showing that light indeed behaves as a wave (according to 20th-century quantum mechanics, however, even ...view middle of the document...

When the hair approached so near to the direction of the margin of a candle that the inflected light was sufficiently copious to produce a sensible effect, the fringes [alternating bands] began to appear; and it was easy to estimate the proportion of their breadth to the apparent breadth of the hair across the image of which they extended. I found that six of the brightest red fringes, nearly at equal distance, occupied the whole of that image. The breadth of the aperture was 66/1000 [of an inch], and its distance from the hair 8/10 of an inch; the diameter of the hair was ... 1/600 [of an inch]. Hence, we have 11/1000 for the deviation of the first red fringe at the distance of 8/10; and as 8/10 / 11/1000 = 1/600 / 11/480000, or 1/43636 [of an inch] for the difference of the routes of the red light where it was most intense.”

Young has thus measured the wavelength of candle light to be 1/43,636 of an inch, or about 582 nm [1 nanometer = 10-9 m; present measurements give yellow light a wavelength ranging from 550 to 600 nm]. Young provided no diagrams nor did he discuss the geometry upon which his computations rested, but he did provide a verbal explanation of the idea that underlies the calculation [ibid., 62]:
... wherever two portions of the same light arrive at the eye by different routes, either exactly or very nearly in the same direction, the light becomes more intense when the difference of the routes is any multiple of a certain length, and least intense in the intermediate state of the interfering portions; and this length is different for light of different colors.... [that is, different colored lights have different wavelengths]

The wave analogy is a powerful idea with many applications throughout science and society. All waves (including sound, light, radar and x-rays) and even some things that are usually thought of as particles (like electrons!) show behavior that can be explained using the wave analogy and the concept of interference.

Thomas Young and the Wave Nature of Light Revised 4/19/06 by DSA for P1 p. 1/8

How waves interfere with each other Young took the alternating light and dark band pattern he observed to be evidence of light behaving like a wave. In order to understand how Young concluded this, we need to examine how waves interact with each other and with barriers. Suppose you are lying on the beach and you observe an ocean wave passing through a small break in a jetty. On the ocean side of the jetty, the crests form lines parallel to the shore. On the inland side of the jetty, the crests form semicircles (see photo at right). If there are two such openings near each other, two circular waves are created and the two waves interact with each other. A diagram from Thomas Young’s work is shown below. The two openings, labeled A and B, are on the left side of the diagram. The circles represent the crests of the waves.

Plane waves pass through a small opening in a barrier, resulting in circular waves....

## Other assignments on Aaaa

### Economy Effect Of Marijuana Essay

277 words - 2 pages Modern American History by Alan Renga 2nd Mid Term! You will be given 3 Short Essay questions and 20 Multiple Choice questions deriving from this list! 80 points total! The 1920s Warren Harding then Calvin Coolidge Tea Pot Dome 1st Red Scare Immigration Restriction, Sacco and Vanzetti Langston Hughes, Marcus Garvey, KKK Prosperity, advertising Prohibition, Al Capone Flappers, Clara Bow, Rudolph Valentino Babe Ruth, Jack Dempsey

### The Vc Shakeout Essay

2033 words - 9 pages ECONOMY 26 Luring a big ﬁrm to town is not the secret to job growth DEFEND YOUR RESEARCH 30 Are morning people wired for success? VISION STATEMENT 32 The social web’s east-west divide COLUMN 38 Warren Bennis looks back on his surprising path to fame New Thinking, Research in Progress hbr.org New Thinking, Research in Progress hbr.org FIRST The VC Shakeout Venture capital hasn’t worked for a decade and must be radically

### Hospitals Paper

6014 words - 25 pages I hope to provide in this paper a comprehensive understanding for what the term “hospital” has become. Hospitals are an extremely complex system that man has created and shaped and reshaped throughout history. My goal in writing and researching this paper will be to provide those who read it a clear understanding on how the hospital system got to where it is today, and to shed some light on the many organizations that affiliate with and

### Course Syllabus

2610 words - 11 pages [pic] COURSE SYLLABUS Semester: Fall, Year: 2012  College Mission Statement Richard J. Daley College provides high-quality education which leads to academic success, career development, and personal enrichment that fulfill diverse community needs. Mathematics Department Mission Statement Our mission is to deliver excellent service and to provide learning opportunities by offering a wide range of mathematics courses, which will help our

### Management

1477 words - 6 pages Boeing Management Planning Heather Oetzel MGT 330 October 22, 2012 Joe Cheng Abstract Boeing is known as “the world’s leading aerospace company and the largest manufacturer of commercial jetliner and military aircraft combined ("The Boeing Company: About Us", 2012). Every company uses different types of management techniques including how the planning function of management is used. Planning allows organizations to develop how the

### Assisted Suicide

1015 words - 5 pages Should physician-assisted suicide be legal? While I believe if one chooses to end his or own life through physician assistance for reasons that they chose, the choice should be up to the individual. Physician-assisted suicide should be at one's discretion. “Assisted Suicide, also called Voluntary Euthanasia, is currently a contentious issue in many countries. Because Euthanasia is legal in a few modern democracies: the Netherlands, Belgium

### Tanglewood Case 1

797 words - 4 pages Tanglewood’s staffing strategy requires the organization to make key decisions about the acquisition, deployment, and retention of the organization’s workforce. In order to accomplish this, Tanglewood’s must make thirteen decisions regarding its staffing levels and its staffing quality. One of the first decisions that Tanglewood needs to choose is to acquire or develop talent. Tanglewood should try to develop their current talent because one

### Nnnnn

1391 words - 6 pages Есе по въпроса: Кои от всички „действащи” лица могат да се разглеждат като морално отговорни и в какво именно? по казуса Форд „Пинто” Корпоративните злодеяния са нанесли повече вреди на обществото от всички улични престъпления взети заедно. Според данни на ФБР сумата от уличните престъпления възлиза на \$3.8 млрд. годишно, а загубите от корпоративните измами между \$100 млрд. и \$400 млрд. годишно

### The Penis

1052 words - 5 pages The short story ”The Penis” is written by Hanif Kureishi. The short story is about a penis, which has been separated from its owner Doug, who we hear from later on. At first though we hear about a guy called Alfie who was “a cutter – a hairdresser – and had to get to work”. He is having breakfast with his wife, when she asks him what he did last night, and if he had a good time last night? Alfie can not remember what he did last night, he then

### Managed Care Paper

543 words - 3 pages Managed Care and Case Management Care Marvin Lloyd BSHS/402-Case Management 27 August 2012 Virgil Miller Managed Care are techniques employed to help reduce the cost for providing health benefits and a system for improving organizations quality of care

### Media

439 words - 2 pages The life expectancy is lower; so people are not kept alive with drugs for decades in a virtual sleep state. There is less state education; so kids don't have it drilled into them that their only goal in life is to make money, at the cost of 'everything' else. The health care is less; so diseases, usually brought by Westerners, kill many more than they do in countries where drug companies can make a fortune from selling medicines that aren't

## Similar Documents

### Input Controls Essay

911 words - 4 pages errors (Shelly & Rosenblatt, p. 365). Some typical examples of input masks are: date, telephone numbers, zip codes, and Social Security numbers. It is important to remember that you can create custom input masks for any data type. This keeps the data entry process intact and decreases the probability of data being incorrect. A good example of a direct input mask is (000) AAA-AAAA. This purpose of this mask allows the user to substitute the four

### Navigator12 Essay

3472 words - 14 pages your system? It places you into nslookup's interactive mode Which DNS record contains the serial number for the zone? SOA Record Which of the following is an example of an SRV record? AD server You can use the dnscmd command to create zones. What other tasks can you perform with it? delete resource records If an A record maps a host name to an IP address, what does an AAAA record do? maps a host name to a single IPv6 address

### Virgin Group Essay

9107 words - 37 pages Atlantic Airlines Manning/ Salter/ Tuinzing Integrated Marketing Communications Integrated marketing communication is defined by the American Association of Advertising Agencies (AAAA) as the a concept of marketing communication planning that recognizes the added value of a comprehensive plan, that evaluates the strategic roles of a variety of communication disciplines - for example general advertising, direct response, sales promotion

### Mgt216 Essay

714 words - 3 pages The first ethical issue presented in the ethics game simulation was whether to warn consumers about the contaminated product and what information to provide consumers about the contaminant. The second ethical issue was whether to sell a product that does not meet U.S. safety requirements in a foreign market that has lower safety restrictions. G-BioSport was not required to meet prior approval from the Federal Drug Administration before they