section). For the pane\'s type of glass, the index of refraction for visible lig

Question

section). For the pane's type of glass, the index of refraction for visible light ranges from 1.555 at the blue end of the spectrum to 1.515 at the red end. The two sides of the pane are parallel. What is the angular spread of the colors in the beam (a) when the light enters the pane and (b) when it emerges from the opposite side? (Hint: When you look at an object through a window pane, are the colors in the light from the object dispersed as shown in, say, Figure (b)?)

Explanation / Answer

n1 sin q1=n1 sinq2

1 sin q1=1.55* sin q2

q2=arc sin ( sin q1)/1.55

q1 is not given

angular dispersion=q2-q1

b) in second case

1.55 sin q2= 1* sin q3

q3=arc sin ( sin q2 1.55)/1

dispersion q3-q2

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