Question

A diffraction is obtained by using a beam of yellow light. What will happen if the yellow light is replaced by the red light?

Options

• Bands will become narrower and crowded together.

• Bands become broader and further apart.

• No change will take place.

• Bands disappear.

Answer 1

Bands become broader and further apart.

Explanation:

`"Band width" prop lambda`

`therefore  lambda_"yellow"< lambda_"red"` hence for red light, The diffraction bands get wider and farther apart.