Question

What happens to the interference pattern,
when the phase difference between two sources
of light changes with time?​

Answer 1

Answer:

If phase difference will change with time then there is chances of having bright fringe,Dark fringe or zero contrastness.

Explanation:

if phase diff.=

$2npi{where n can be 0toinfinity}$

There is constructive interference.

and between these points there will be darkness or destructive interference.