979_Physics ProblemsTechnical Physics

979_Physics ProblemsTechnical Physics - 320 The Nature of...

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320 The Nature of Light and the Laws of Geometric Optics Section 35.3 The Ray Approximation in Geometric Optics Section 35.4 Reflection Section 35.5 Refraction *P35.5 (a) Let AB be the originally horizontal ceiling, BC its originally vertical normal, AD the new ceiling and DE its normal. Then angle BAD = φ . By definition DE is perpendicular to AD and BC is perpendicular to AB . Then the angle between DE extended and BC is because angles are equal when their sides are perpendicular, right side to right side and left side to left side. A B C D E FIG. P35.5(a) (b) Now CBE = is the angle of incidence of the vertical light beam. Its angle of reflection is also . The angle between the vertical incident beam and the reflected beam is 2 . A D E FIG. P35.5(b) (c) tan . . 2 140 000194 == cm 720 cm 00557 . P35.6 (a) From geometry, 1 25 40 0 .s i n . m d so d = 194 . m . (b) 50 0 . ° above the horizontal
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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