Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror (M_{1}) and parallel to the second mirror (M_{2}) is finally reflected from the second mirror (M_{2}) parallel to the first mirror (M_{1}). The angle between the two mirrors will be:

a. |
90° |
b. |
45° |

c. |
75° |
d. |
60° |

Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror (M_{1}) and parallel to the second mirror (M_{2}) is finally reflected from the second mirror (M_{2}) parallel to the first mirror (M_{1}). The angle between the two mirrors will be:

a. |
90° |
b. |
45° |

c. |
75° |
d. |
60° |

1 Answer

127 votes

Assuming angles between two mirrors be θ as per geometry,

Sum of angles of

3θ=180°

θ =60°

127 votes

127