Two transparent slabs have the same thickness as shown in figure. One in made of material A of refractive index 1.5. The other i

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

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 materila

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