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Two transparent slabs have the same thic...

Two transparent slabs have the same thickness as shown in figure. One in made of material A of refractive index 1.5. The other is made of two materilas B and C with thickness in the ratio 1:2. The refractive index of C is 1.6. If a monochromatic parallel beam passing through the slabs has the same number of wavelengths inside both, the refractive index of B is

A

1.1

B

1.2

C

1.3

D

1.4

Text Solution

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The correct Answer is:
c
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