21. Aray of light is incident at 50° on the middle of one of the two mirrors arranged at an angle of 60° between them. The may then touches the second mirror, gets reflected back to the first mirror, making an angle of incidence of
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A ray of light is incident at 50° on the middle of one of the two mirrors arranged at an angle of 60° between them. The ray then touches the second mirror, gets reflected back to the first mirror, making an angle of incidence. 50° 60°
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