Quiz06a-s

# Quiz06a-s - Quiz 6a Name Date Phys224 Spring 2010 Dr P...

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Unformatted text preview: Quiz 6a Name: Date: Phys224 Spring 2010 Dr. P. Hanlet Concept (3 points each) 1. A monochromatic source produces light at a wavelength Î» = 510 nm in air. The wave then passes through water with an index of refraction of n = 1 . 32. The frequency of the wave in the water is then: (a) 7 . 76 Ã— 10 14 Hz (b) 4 . 45 Ã— 10 14 Hz (c) 5 . 88 Ã— 10 14 Hz (d) 4 . 54 Ã— 10 14 Hz (e) 5 . 10 Ã— 10- 9 Hz Though the velocity and wavelength of a wave change when going through different media, the frequency remains the same. Hence: v = Î»f = â‡’ f = v Î» = c Î» since v = c for light. So: f = 3 . Ã— 10 8 a8 a8 m/s 510 Ã— 10 âˆ’ 9 a8 a8 m = 3 . Ã— 10 8 /s 5 . 10 Ã— 10 âˆ’ 7 = 3 . Ã— 10 15 5 . 10 s âˆ’ 1 = 3 . 5 . 10 Ã— 10 15 s âˆ’ 1 = 5 . 88 Ã— 10 15 Hz 1 Problem (5 pts) Show your work!!! If I can read it, I will give you partial credit!!! Correct answers without work will NOT get full credit. 2. In the figure two beams of monochromatic, coherent (with each other), light of wavelength Î» =500 nm , impinge normally on two blocks of lengths...
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Quiz06a-s - Quiz 6a Name Date Phys224 Spring 2010 Dr P...

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