A slab of transparent material is made as shown in the given figure. Monochromatic parallel beams of light are normally incident on the slab. The thickness of C is twice the thickness of B. If the number of waves in A = number of waves in combination of B and C, then the refractive index of B is:
Text Solution
Verified by ExpertsThe correct answer is:
B
Let thickness of 
thickness of 
and thickness of 
If 
is wavelength in air, then as number of waves in A = no. of waves in B + no. of waves in C.
or, 
or 
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