320 The Nature of Light and the Laws of Geometric OpticsSection 35.3The Ray Approximation in Geometric OpticsSection 35.4ReflectionSection 35.5Refraction*P35.5(a)Let ABbe the originally horizontal ceiling, BCits originally verticalnormal, ADthe new ceiling and DEits normal. Then angleBAD=φ. By definition DEis perpendicular to ADand BCisperpendicular to AB. Then the angle between DEextended and BCis because angles are equal when their sides are perpendicular,right side to right side and left side to left side.ABCDEFIG. P35.5(a)(b)Now CBE=is the angle of incidence of the vertical light beam. Itsangle of reflection is also . The angle between the vertical incidentbeam and the reflected beam is 2.ADEFIG. P35.5(b)(c)tan..2140000194==cm720 cm=°00557.P35.6(a)From geometry,1 2540 0.sin.mdsod=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 .