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Path difference between two wavefronts e...

Path difference between two wavefronts emitted from coherent sources is `2.1 mu m`. Phase difference between the wavefronts at that point is 7.692 `pi`the wavelength of light emitted by source will be

A

`5385Å`

B

`5600Å`

C

`5460Å`

D

`5892Å`

Text Solution

Verified by Experts

The correct Answer is:
C
Phase difference `phi=(2pix)/(lamda)` or `lamda=(2pix)/(phi)`
`=2xpixx(2.1xx10^(-6))/(7.692pi)=5460xx10^(-10)m`
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