Question

In Young’s double slit experiment, how is interference pattern affected when the following changes are made:

1. Slits are brought closer to each other.
2. Screen is moved away from the slits.
3. Red coloured light is replaced with blue coloured light.

Answer 1

1. Fringe width (separation) increases.
2. Fringe width (separation) increases.
3. Fringe width (separation) decreases.