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Two coherent sources P and Q produce int...

Two coherent sources P and Q produce interference at point A on the screen where there is a dark band which is formed between 4th bright band and 5th bright band. Wavelength of light used is 6000 Å. The path difference between PA and QA is

A

`1.4xx10^(-4)cm`

B

`2.7xx10^(-4)cm`

C

`4.5xx10^(-4)cm`

D

`6.2xx10^(-4)cm`

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The correct Answer is:
B
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