chp39_5 - located 10 meters below the surface of a large...

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PHY2061 R. D. Field Department of Physics chp39_5.doc University of Florida Total Internal Reflection Total internal refection occurs when light travels from medium n 1 to medium n 2 ( n 1 > n 2 ) if θ 1 is greater than or equal to the critical angle, θ c , where sin θ c n n = 2 1 . Problem: A point source of light is
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Unformatted text preview: located 10 meters below the surface of a large lake ( n=1.3 ). What is the area (in m 2 ) of the largest circle on the pools surface through which light coming directly from the source can emerge? ( answer: 455 ) c 2 =90 o n 1 n 2 c R n 1 =1.3 n 2 =1...
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