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Two coherent sources separated by distan...

Two coherent sources separated by distance d are radiating in phase having wavelength `lambda`. A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of `n=4` interference maxima is given as

A

`"sin"^(-1)(nlamda)/d`

B

`"cos"^(-1)(4lamda)/d`

C

`"tan"^(-1)(d)/(4lamda)`

D

`"cos"^(-1)(lamda)/(4d)`

Text Solution

Verified by Experts

The correct Answer is:
B
Path difference,
`Deltax=S_(1)P-S_(2)P=dcostheta`.
`thereforedcostheta=4lamda`
or `costheta=(4lamda//d)`
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DISHA PUBLICATION-WAVE OPTICS-EXERCISE-1 : CONCEPT BUILDER
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