1.

Fraunhoffer diffraction experiment at a single slit light of wavelength 400 nm, the first minimum is formed at an angle of 30^(@). The direction theta of the secondary maximum is

Answer»

`SIN^(-1)(3//2)`
`sin^(-1)(3//4)`
`COS^(-1)(3//4)`
`cos^(-1)(3//2)`

ANSWER :B


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