Question

In Young's double-slit experiment, if the two sources of light are very wide, then ______.

Options

• the interference fringes are very wide

• the interference fringes are very narrow.

• uniform illumination is obtained instead of alternate bright and dark fringes.

• interference does not occur.

Answer 1

In Young's double-slit experiment, if the two sources of light are very wide, then uniform illumination is obtained instead of alternate bright and dark fringes.

Explanation:

The contrast between the fringes reduces as the slit width grows. Uniform lighting happens when the width is quite broad.