Unformatted text preview: surrounded by a cylindrical glass “cladding” with index of refraction n 2 = 1.46. Solution: ∆ t = t B-t A = l B v-l A v = 1 v ( l A sin θ c-l A ) = n 1 l A c ( n 1 n 2-1) = 1.7 × 10-8 s Problem 3 A light ray is propagating in a crystal where its wavelength is 540 nm. It strikes the interior surface of the crystal with an angle of 34 o and emerges into the surrounding air at 76 o to the surface normal. Find (a) the light frequency and (b) its wavelength in air. Solution: The index of refraction of the crystal: 74 . 1 34 sin 76 sin 2 = = o o n . (a) Frequency of the light is f = cn 2 λ 2 = 3 .2 × 10 14 H z . (b) 1 = cf = 937 nm...
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- Winter '08
- Physics, Total internal reflection, ray B, RAY A