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Consider slabs of three media A,B, and...

Consider slabs of three media A,B, and C. Arragned as shown inn figure . R.I of A is 1.5 and that of C is 1.4. If the number of waves in the combination B and C then refractive index of B is

A

1.4

B

1.5

C

1.6

D

1.7

Text Solution

Verified by Experts

The correct Answer is:
4
`n_(A) = n_(B) + n_(c)`
`mu_(A)d_(A) =mu_(B)d_(B) + mu_(C)d_(C)`
`1.5 (3x)= mu_(B)(x) + 1.4(2x)`
`4.5= mu+ 2.8`
`mu_(B) = 4.5 - 2.8 = 1.7`
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