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Unformatted text preview: Physics 1C Lecture 22B "Somehow light is particle and wave. The experimenter makes the choice. You get what you interrogate for. And you want to know if I'm a wave or a particle."Tom Stoppard Quiz 2 Info It will be a Scantron test that covers Chapters 14 and 21. A list of equations, constants, and conversions will be provided on the quiz. You are to write the version of your test on the Scantron form. You will use the Quiz Code Number that you were assigned at the Frst Quiz. You are expected to abide by UC Policy on Integrity of Scholarship. From Last Time A light ray travels from medium 1 to medium 3 as shown in the ¡gure below. What can we say about the relationship between the index of refraction for medium 1 (n 1 ) and the index of refraction for medium 3 (n 3 )? Use Snell’s Law twice: Equation the two n 2 : 30 o Refraction of Light Last time we calculated the angle of refraction going from air to glass. What if instead of going from air to glass with an incident angle of 30.0 o , it went from glass to air with the same incident angle: n 1 sin θ 1 = n 2 sin θ 2 sin θ 2 = n 1 n 2 sin θ 1 θ 2 = sin − 1 n 1 n 2 sin θ 1 Λ Ν Μ Ξ Π Ο θ 2 = sin − 1 1.52 1.0003 sin30 ° Λ Ν Μ Ξ Π Ο θ 2 = sin − 1 0.760 ( ) = 49.4 ° Here the angle increased (slow to fast). Refraction of Light What if instead having an incident angle of 30.0 o (from glass to air) it had an incident angle of 60.0 o (still glass to air): n 1 sin θ 1 = n 2 sin θ 2 sin θ 2 = n 1 n 2 sin θ 1 θ 2 = sin − 1 n 1 n 2 sin θ 1 Λ Ν Μ Ξ Π Ο Here the angle doesn’t exist. Here the angle doesn’t exist....
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 Spring '00
 F
 Physics, Light, Angle of Incidence, Sin, Total internal reflection, Geometrical optics

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