Question: Two plane mirrors meet at a right angle (Fig. P24.3). An incident ray strikes the bottom mirror at point B with an angle of incidence
Two plane mirrors meet at a right angle (Fig. P24.3). An incident ray strikes the bottom mirror at point B with an angle of incidence θi; this ray reflects from each mirror once and strikes the screen on top at point A. (The screen is parallel to the bottom mirror.) Given the dimensions in Figure P24.3, what is θi?

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