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

Options

A. `(lambda)/(2b)`
B. `(lambda)/(b)`
C. `(2lambda)/(b)`
D. `(b)/(lambda)`

Answer

B

Explanation

`beta=(lambdaD)/(d) and theta=(beta)/(D)`
`therefore theta=(lambda)/(d)`
`therefore` Width of single slit = b
So, `theta=(lambda)/(b)`