Question

What the distance between a point source of light and screen is halved what will be the changes in illumination screen?

Answer 1

Answer:the fringes formed will be closer to each other.

Explanation:

We know that the fringe spacing is given by:

Fringe spacing=wavelength×D/d

If the distance is halved,then fringespacing=wavelength×D/2d

So now the fringe spacing will also be decreased by 2 and the fringes will be closer to each other