Question

What is the difference between interference and diffraction of light

Answer 1

Explanation:

Interference

1. Interference fringes are formed when the two light rays from the coherent sources are superimposed.

2. All bright fringes are equally illuminated.

3. Width of all fringes are always equal.

4. Minimum intensity is zero, so fringes can be distinguished very well.

Diffraction

1. Fringes are formed due to super position of light rays from the same source.

2. Central fringe is brightest and all other fringes have intensity in decreasing order.

3. Fringe width decreases when we move away from the centre.

4. Minimum intensity fringes are not perfectly darker so it is relatively difficult to distinguish bright and dark fringes

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