Two plane mirrors \( M_{1} \) and \( M_{2} \) each have length \( 1...

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Two plane mirrors \( M_{1} \) and \( M_{2} \) each have length \( 1 \mathrm{~m} \)
P and are separated by \( 1 \mathrm{~cm} \). A ray of light is incident

W on one end of mirror \( M_{1} \) at an angle of \( 45^{\circ} \). How many reflections will the ray have before going out from the other end?
(1) 50
(2) 51
(3) 100
(4) 101
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