What should be the path difference between two interfering waves for constructive interference and destructive interference?

Is the law of conservation of energy obeyed in case of interference of light? Explain.

What are the conditions for constructive and destructive interference of light waves?

Does the interference of light waves obey the law of conservation of energy? Explain.

A two-slit interference experiment is setup and the fringes are displayed on a screen. Then the whole apparatus is immersed in a water. How does the fringe pattern change?

Two waves are represented in usual notation as y₁ = a₁ sin ωt and y₂ = a₂ cos ωt. Their intensities are I₁, and l₂. What would be the ratio of their amplitudes when l₁, = 2l₂?

What are coherent sources of light?

Can two different bulbs, similar in all respects, act as coherent sources?

What happens on the interference fringes in a Young's double slit experiment when (i) the screen is moved away (ii) the source is replaced by another source of shorter wavelength?

What is interference of light? Two coherent waves, each of intensity I, are producing an interference pattern. What will be the resultant intensity at a point of

1. constructive interference and
2. destructive interference?

Obtain the expression for the position of n^th order maxima from central bright fringe in Young's double slit experiment.

In Youngs double slits experiment, what changes will you observe in fringe width for the following operations:

1. When experiment is shifted from air to inside water
2. When slits width is increased?

In Young's double slit experiment, bright and dark bands are formed on a screen due to interference of light.

1. Define interference of light.
2. Calculate the fringe width (β)
3. When the whole apparatus is immersed in a liquid, what will be the effect on the fringe width?

1. Define interference of light. Does it follow the principle of conservation of light energy? Justify your answer.
2. In Young's double slits experiment, show that bright and dark fringes are equally spaced.

1. Write sustainable conditions for interference?
2. "The bright and dark fringes are equally spaced." Justify this statement from Young's double slit experiment.