Plane mirrors A and B are kept at an angle with respect to each other. Light falls on A, is reflected, then falls on B and is reflected. The emergent ray is opposite to the incident direction. Then the angle is equal to
Physics · Geometrical optics
Plane mirrors A and B are kept at an angle with respect to each other. Light falls on A, is reflected, then falls on B and is reflected. The emergent ray is opposite to the incident direction. Then the angle is equal to
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