Two flat rectangular mirrors are set edge to edge and placed perpendicular to a flat nonreflecting surface. A light ray that reflects from mirror 1 at angle ?M1 then strikes the second mirror and reflects at ?M2 such that the angle between the ray reaching mirror 1 and the ray leaving mirror 2 is 180°. The angle between the two mirrors is

a. 0°.
b. 45°.
c. 90°.
d. 150°.
e. 235°.


c

Physics & Space Science

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