lect5417 - 1. What is the fundamental difference between a...

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1. What is the fundamental difference between a real image and a virtual one? 2. Parallel light rays are focused on the focal point of a concave mirror. Where do you want to place the bulb in a searchlight, which uses a concave mirror , to produce a parallel beam?
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Atmospheric Refraction
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Dispersion and Colors
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One combination of light beams that produces most of the colors that we perceive is red, green and blue. These are primary colors.
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Red + Green = Yellow
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Blue + Green = Cyan
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Red + Blue = Magenta
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Two colors that produce white light when added together are called complementary colors.
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Mixing paints is different from mixing colored lights. Mixing paints is subtractive process, whereas with light beams you are adding colors.
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Why is the sky blue? Why is the sun yellow?
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Rainbows
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What color is produced by the overlap of a blue spotlight and a red spotlight? 2. A surface appear yellow under the white light. How it will appear under red light? Under green light? Under blue light?
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This note was uploaded on 05/05/2009 for the course PHYSICS 1002 taught by Professor Borovitskaya,elena during the Spring '09 term at Temple.

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lect5417 - 1. What is the fundamental difference between a...

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