# Question: Two upright plane mirrors touch along one edge where their

Two upright plane mirrors touch along one edge, where their planes make an angle of α. A beam of light is directed onto one of the mirrors at an angle of incidence of β(β < α) and is reflected onto the other mirror.

(a) Will the angle of reflection of the beam from the second mirror be (1) α, (2) β, (3) α + β, or (4) α – β?

(b) If α = 60o and, β = 40o,what will be the angle of reflection of the beam from the second mirror?

(a) Will the angle of reflection of the beam from the second mirror be (1) α, (2) β, (3) α + β, or (4) α – β?

(b) If α = 60o and, β = 40o,what will be the angle of reflection of the beam from the second mirror?

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