Interference Of Light Waves: Young's Double Slit Experiment

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Fundamental Concept

Light and other Electromagnetic Waves have dual character, i.e. they show properties of both matter and waves. Young's Double Slit Experiment is a proof of the Wave Nature of Light while The Photoelectric Effect proves the partical Nature of Light.

The basic logic as I understand it is that, when particles meet at a point, they collide. When two waves meet at a point they interfere. It is like drawing two graphs on the same graph paper and then getting the resultant.

If two waves interfere at a point, then there Amplitudes are related as :

A_net = A₁ + A₂

Pulleys

A pulley is a simple mechanical device used either to change the direction of force or gain Mechanical Advantage or both. Questions from this topic, are usually combined with other topics in JEE and to solve such problems a basic knowledge of this topic is essential.


The Basic Concepts that you need to know are: