Question
Asked Dec 25, 2019
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One technique for measuring
the angle of a prism is
shown in Figure P22.51.
A parallel beam of light is
directed onto the apex of
the prism so that the beam
reflects from opposite faces
of the prism. Show that
the angular separation of
the two reflected beams is
given by B = 2A.

ө,
B
Figure P22.51
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ө, B Figure P22.51

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Expert Answer

Step 1

The ray diagram for the parallel beam through the prism is shown below,

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в, өт

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Step 2

From the left side of the figure, the angle

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α= 90-0 β= 90 0-θ so α-β

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Step 3

From the right side of the...

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δ=90-θ γ- 90-0 SO δ

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