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A plane wave front of wavelength lamda i...

A plane wave front of wavelength `lamda` is incident on a single slite of width b. What is the angular width for secondary maximum ?

A

`(lamda)/(db)`

B

`lamda/b`

C

`(2lamda)/(b)`

D

`(b)/(lamda)`

Text Solution

Verified by Experts

The correct Answer is:
B
`beta=(lamdaD)/(d)and theta=(beta)/(D)`
`therefore theta=(lamda)/(d)`
Width of single slit = b
SO, `theta=(lamda)/(b)`
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