Five questions In this homework we give you five short questions involving the c
ID: 2304174 • Letter: F
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Five questions In this homework we give you five short questions involving the concepts of light and waves. Answer each question with one or two short sentences. Make sure you give a good physical (or possibly also physiological) argument in your answer, not just an opinion! . If a mixture of red and green light hits the human eye, it will create the visual impression of "yellow .e, not a mixture of red and green) hits the The same happens if light of the spectral color yellow (i eye. Why can't the eye tell these obviously different situations apart? A science fiction scenario: The Earth is visited by (benevolent) aliens. They also happen to have eyes which are light sensitive in a range that coincides with the range where human eyes can see (so roughly between 380nm and 750nm). However, unlike we humans, the aliens have 16 different color receptor spread out over the visible spectrum, not just 3. One evening, alien P. Xuthus watches the Superbowl with his Earth-friend Steve on Steve's brand new plasma TV. He asks Steve: "Look. I know you spent an awful lot of money on that TV, but the colors are all horribly wrong. They have nothing to do with what things really look like! How can you stand watching this? Why don't you humans build TVs which make things appear in the colors they actually have?" Steve, however, is confused. The colors look perfectly fine (in fact, positively awesome) to him. What is going on 3. The speed of light in glass is given by class Ccuum/n, where n is the "index of refraction (which typically has values somewhere around 1.5). In graded-index optical fibers n is not the same everywhere in the fiber. It is bigger near the central axis by maybe 2% compared to the edges of the fiber Explain, why this can keep light, which is sent through the fiber, inside the fiber 4. If you buy new ink cartridges for your ink-jet printer, they come in the colors "cyan", "magenta" and "yellow". Do you think that's weird? Haven't we just learned that all colors are made of "red" "green" and blue", because that's what the color receptors in the human eye can see? Why these complementary colors used? 5. As you well know, soap bubbles exhibit wonderful iridescent color patterns. Their origin is similar to the effect that makes oil slicks colorful (see explanation in Muller's book): the reflection of light at the two sides of the very thin soap film. Look up what the word "iridescence" actually means and explain, why this effect occurs for soap films. If you feel a little schematie picture might help your argument, feel free to supply one. (Hint: Interference!)Explanation / Answer
1. It appears yellow because red and green wave interfere to gibe wavelength close to the wavelength of yellow light.
2. Human eyes have range of wavelength that we can see but there are infrared and ultraviolet region also which we cant see hence alien would see different colours of everything.
3. The graded optical fibre bent light as the refractive index increases, this bending continue till the refractive index changes, ultimately the light is fully bend and travel through the fibre.
4. RBG and CMYK are two different ways of mixing of colurs that our eyes can sense them.
5. The light reflected from the upper part of the film and lower part of the film interferes and at different angle condition of maxima satisfies by different wavelength and we see different colors.
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