Quiz4-Sol-SSII091

Quiz4-Sol-SSII091 - Physics 2C Summer Session II Quiz #4...

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Unformatted text preview: Physics 2C Summer Session II Quiz #4 Multiple Choice. Choose the answer that best completes the statement or answers the question. 1 . A plane wave of linearly polarized light is incident on a stack of 2 linear polarizers. The polarization angle of the incident light is rotated by an angle 3 &= 8 with respect to the &rst polarizer whose polarization axis is rotated by an angle & &= 8 with respect to the second polarizer. The intensity of the light relative to the incident intensity, I=I ; is A) : 073 B) 1 = 16 C) 1 = 8 D) 1 = 4 E) : 354 From the Law of Malus we have I I = cos 2 (3 &= 8) cos 2 ( & &= 8) = : 125 ! C 2 . Red light emitted by hydrogen atoms at rest in the laboratory has a wavelength of 656 : 3 nm . The same spectral line emitted by hydrogen atoms from a distant galaxy has a frequency of 4 : 16 10 14 Hz . The relative velocity of the galaxy relative to Earth is (speed of light is c = 3 10 8 m= sec ) A) 1 : 41 10 7 m= sec B) 2 : 82 10 7 m= sec C) 2 : 96 10 7 m= sec D) 2 : 70 10 7 m= sec E) 1 : 48 10 7 m= sec The observed wavelength of the light as it reaches Earth is obs = 3 10 8 = & 4 : 16 10 14 = 721 : 15 nm From the expression for the Doppler shift of light we &nd obs = em s 1 + v=c 1 & v=c !...
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Quiz4-Sol-SSII091 - Physics 2C Summer Session II Quiz #4...

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