Two plane mirrors intersect at right angles. A laser beam strikes the first of them at a point 15. 0 cm from their point of intersection as shown. For what angle of incidence at the first mirror will this ray strike the second mirror 17. 5 cm below the point of intersection after reflecting from the first mirror?.
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Two plane mirrors intersect at right angles. A laser beam strikes the first of them at a point 15. 0...
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