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A diffraction patter is obtained by maki...

A diffraction patter is obtained by making lbue light incident on a narrow slit. It blue light is replaced by red light then

A

diffraction bands disappear

B

diffraction bands become broader

C

diffraction bands become narrower

D

there is not change in diffraction pattern

Text Solution

Verified by Experts

The correct Answer is:
B
`asintheta=lamda` i.e., `theta prop lamda and lamda_(R) gt lamda_(b)`
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