Problem: A light ray leaves point A in Figure 1, reflects from the mirror, and reaches point B. a) How far below the top edge does the ray strike the mirror? b) What if the distance from point B to the mirror was reduced by 5 cm?

FREE Expert Solution

Angle of incidence, θi=Angle of reflection θr

Thus, the angles marked with φ  are equal.

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Problem Details

A light ray leaves point A in Figure 1, reflects from the mirror, and reaches point B. 

a) How far below the top edge does the ray strike the mirror? 

b) What if the distance from point B to the mirror was reduced by 5 cm?