Question

A student performs an experiment similar to Young’* Double Slit Experiment. Coherent light passes through two narrow slits and produces a pattern of alternating bright and dark lines on a screen. Which of the following would cause the bright lines on the screen to be further apart?

I. Increasing the distance between the slits

II. Decreasing the distance between the slits

III. Decreasing the wavelength of the light

A) I only

B) II only

C) III only

D) I & III only

E) II & III only

Answer 1

The correct option is: (B) II only

Explanation:

Based on m λ = dx / L we want to increase x. Only II does this.