Question

For the interference pattern to be steady and clearly visible which of the following is NOT correct?

Options

• The two slits should be narrow.

• Two interfering waves must have same amplitude.

• The two waves should be in the different state of polarization.

• The two sources of light must be coherent.

Answer 1

The two waves should be in the different state of polarization.

Explanation:

For a clear and steady interference pattern, the waves must have the same state of polarization; otherwise, they do not interfere effectively.
Coherent sources and narrow slits are necessary, and equal amplitudes give better visibility.