What happens to the interference pattern,when one of the slits is closed?

What happens to the interference pattern if phase difference between two light sources varies continuously?

Draw a graph showing the variation of intensity verses the position on the screen in Young's experiment, when one of the slits is closed.

When is the interference destructive?

When is the interference constructive?

What is the effect on the interference pattern in Young's double slit experiment due to each of the following operations? The widths of the slits are increased equally.

What will happen to the interfernce pattern in Young's experiment,if the source is not exactly on the centre line between the slits?

What is the effect on the interference pattern in Young's double slit experiment due to each of the following operations? The shole apparatus is kept in a denser medium.

Answer the following questions: In what way is diffraction from each slit related to the interference pattern in a double-slit experiment?

Sketch the variation of intensity of the interference pattern in Young's double slit experiment.