Two Flat Rectangular Mirrors Are Set Edge to Edge and Placed

question 9

Multiple Choice

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 $\theta$ _M1 then strikes the second mirror and reflects at $\theta$ _M2 such that the angle between the ray reaching mirror 1 and the ray leaving mirror 2 is 180 $\degree$ .The angle between the two mirrors is

• A)0 \(\degree\).
• B)45 \(\degree\).
• C)90 \(\degree\).
• D)150 \(\degree\).
• E)235 \(\degree\).

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