Lecture 17 Notes

Lecture 17 Notes - Recap of last lecture For light...

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Unformatted text preview: Recap of last lecture For light traveling from a to b where n a > n b , as the angle of incidence becomes more and more acute, the light ceases to be transmitted, only reflected. crit = sin-1 (n b /n a ) TIR Frustrated TIR A. Light traveling through water (n=1.33) hitting a water-air interface at an incident angle of 50 o (sin 50 = 0.766) B. Light traveling in water hitting a water-glass (n=1.52) interface at an incident angle of 50 0 (1.33/1.52 =0.875) C. Light traveling in glass hitting a glass-water interface at an incident angle of 50 D. Light traveling through water incident on water-air interface at an incident angle of 90 In which of the following situations is there TIR? Problem 33.55 When the sun is either rising or setting and appears to be just on the horizon, it is in fact below the horizon. This is because the sun light bends slightly when entering the Earths atmosphere, as shown in the figure. In terms of the radius of the Earth and the height of the atmosphere, and assuming the atmosphere is of uniform density (and hence uniform refractive index n) calculate the angle of deviation. Problem 33.55Problem 33....
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Lecture 17 Notes - Recap of last lecture For light...

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