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Unformatted text preview: Create assignment, 00224, Homework 9, Apr 13 at 6:57 am 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Mirror Reflection 35:04, trigonometry, numeric, > 1 min, nor- mal. 001 A ray of light incident upon a mirror makes an angle of 36 with the mirror. What is the angle between the incident ray and the reflected ray? Correct answer: 108 . Explanation: The angle of incidence is i = 90 - Since the angle of refraction equals the angle of incidence, the angle between these two rays is = 2 i = 2(90 - ) = 108 . keywords: Air to Crown Glass 35:06, trigonometry, numeric, > 1 min, nor- mal. 002 A ray of light is incident at an angle of 60 on the surface of a piece of crown glass whose index of refraction is 1 . 52 . What is the angle of refraction? Correct answer: 34 . 7331 . Explanation: By Snells Law, for an angle of incidence and an angle of refraction , n air sin = n sin sin = sin n , so = arcsin sin n = arcsin sin 60 1 . 52 = 34 . 7331 , since n air = 1. keywords: Light Ray Leaving a Pool 35:06, trigonometry, numeric, > 1 min, nor- mal. 003 A light source, S , is located 2 . 2 m below the surface of a swimming pool and 1 . 1 m from one edge of the pool. The pool is filled to the top with water, whose index of refraction is 1 . 33. At what angle (to the vertical) does the light reaching the edge of the pool leave the water? Correct answer: 36 . 498 . Explanation: Basic Concepts By Snells Law, n i sin i = n r sin r The light is incident in water....
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