A diffraction pattern is obtained using a beam of red light. What happens if the red light is replaced by blue light

Options

A. No change.
B. Diffraction bands become narrower and crowded together.
C. Band become broader and farther apart.
D. Bands disappear altogether.

Answer

B

Explanation

As `lambda_("blue")lt lambda_("red"),` and width of diffraction bands is directly proportional to `lambda`, therefore diffraction bands become narrower and crowded.