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Light is incident normally on a diffract...

Light is incident normally on a diffraction grating through which the first order diffraction is seen at `32^@`. The second order diffraction will be seen at

A

`84^(@)`

B

`48^(@)`

C

`64^(@)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
D
For second-order diffraction,
  `sintheta_(2)-(2lambda)/(d)=2sintheta_(1) = 2 sin 32^(@) > 1`, which is not possible.
Hence, there is no second-order diffraction
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