Geometrical OpticsHard
Question
A ray of light of intensity I is incident on a parallel glass-slab at a point A as shown in fig. It undergoes partial reflection and refraction. At each reflection 25% of incident energy is reflected. The rays AB and A′B′ undergo interference. The ratio Imax / Imin is
Options
A.4 : 1
B.8 : 1
C.7 : 1
D.49 : 1
Solution
From figure I1 =
and I2 = 
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