Plane Polarized light

If a ray of light travels in any direction, it has vibrations in all directions at right angles to the path of propagation. If this lights passed through Nicola prism*, then the light which emerges out of the prism is found to have vibrations only in one plane. This light is called ‘plane polarized light’. The Nicola prism thus used is called a polarizer.

                        Plane Polarized light and its rotation

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