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Unformatted text preview: Because of the fact that the rays refract away from the normal as they exit the water, the ﬁsh appears to be shallower than it actually is. Hence the answer must be C (6). Correct answer is B B max = E max /c (7). Correct answer is B The intensity equals I = E 2 2 μ c = P 4 πR 2 Plugging in all the numbers gives P=1500 W. 2 (8). Correct answer is C Going through the ﬁrst ﬁlter reduces the intensity by .5 and going through the second by cos 2 θ . Setting this equal to .37 gives result C (9). Correct answer is B Going from one medium to another does not change the frequency; since the speed changes, the wavelength must also change (10). Correct answer is E Plane mirrors have an image that is always the same size as the object....
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 Spring '11
 groisman
 Light, Angle of Incidence, Total internal reflection

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