Refraction of light rays through a plate of glass
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Because of refraction in the plate of glass, an object viewed through an ordinary window will seem somewhat nearer than its actual distance.
a) Consider the rays that strike the glass at a small angle of incidence (nearly normal). Show that if an object is at distance l from a window, the image is at a distance that is shorter by an amount Δl - (1 - 1/n)d, where n is the index of refraction and d is the thickness of the glass.
b) What change in distance does this formula give if the windowpane is ordinary glass with d - 2.0 mm and n = 1.5?
c) What change in distance does this formula give if the windowpane is heavy plate glass with d = 8.0 mm and n = 1.5?
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Solution Summary
Provides steps necessary to determine the refraction of the light rays.
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