Horizontal rays of red light (λ = 660 nm, in vacuum) and violet light (λ = 410 nm, in vacuum) are incident on?
Horizontal rays of red light (λ = 660 nm, in vacuum) and violet light (λ = 410 nm, in vacuum) are incident on the flint-glass prism shown in the drawing. The indices of refraction for the red and violet light are nred = 1.662 and nviolet = 1.698. The prism is surrounded by air. What is the angle of refraction for (a) red ray, (b) violet ray as it emerges from the prism?
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Use Snell's Law to work out the answers! Remember that...
sin(θ_1)/sin(θ_2) = v_1/v_2 = n_1/n_2 where...
v = velocity of the ray
n = index of refraction
You should get...
sin(θ_1)/sin(θ_2) = 1.662/1.698
Since you didn't indicate the given angles of how the rays are shot, there is no way to determine the angle of refraction.
See... http://en.wikipedia.org/wiki/Snell%27s_law
angle_violet = tan^-1(n_violet/n_red)
angle_red = tan^-1(n_red/n_violet)