Question

How is the distance between interference fringes affected by the separation between the slits of Young experiment? Can visible light produce interference fringes? explain

Answer 1

Answer

In Young double slits experiment fringe width is given by

$\beta=\frac{D}{d\lambda}$

Where d is seperation between slits

According above equation if we increase d fringe width decreases and vice versa.

Yes, The fringes are presence or absence of light. In other words, change in intensity and distribution. Not a different color.