A Young's double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is

A young.s double slit experiment uses a monochromatic source. The shape of interference fringes formed on a screen is

In Young's double slit experiment what is the shape of interference fringes?

In Young's double slit experiment what is the effect of the following operations on interference fringes ? (i) The screen is moved away from the plane of the slits.

In Youngs double slit experiment with monochromatic light the central fringe will be:

What is the effect on the interference fringes in Young's double slit experiment when the monochromatic source is replaced by a source of white light?