Optics Question 1143

Question: Two coherent sources of intensity ratio 1 : 4 produce an interference pattern. The fringe visibility will be

[J & K CET 2004]

Options:

A) 1

B) 0.8

C) 0.4

D) 0.6

Show Answer

Answer:

Correct Answer: B

Solution:

I1I2=14I1=k and I2=4k

Fringe visibility V=2I1I2(I1+I2)=2k×4k(k+4k)=0.8



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