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polarisation by reflection- Marise, Hriday and Dhruv 

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polarisation by reflection- Marise, Hriday and Dhruv 

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Why can't it occur off metallic surfaces?
The extent to which polarization occurs is dependent upon the angle at which the light approaches the surface and upon the material that the surface is made of. Metallic surfaces reflect light with a variety of vibrational directions, such reflected light is unpolarized

Applications of polarisation by reflection
Application of polarization –
Used in sun glasses
Reduce excess glare that enters the glasses

o   Polaroid sheets are fitted on the spectacles

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Circular vs linear vs elliptical polarization - Simran, Prakrit, Pranav

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Circular vs linear vs elliptical polarization - Simran, Prakrit, Pranav

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If light is composed of two plane waves of equal amplitude by differing in phase by 90°, then the light is said to be circularly polarized. If two plane waves of differing amplitude are related in phase by 90°, or if the relative phase is other than 90° then the light is said to be elliptically polarized.

A plane electromagnetic wave is said to be linearly polarized. The transverse electric field wave is accompanied by a magnetic field wave

Circularly polarized light consists of two perpendicular electromagnetic plane waves of equal amplitude and 90° difference in phase.

Elliptically polarized light consists of two perpendicular waves of unequal amplitude which differ in phase by 90°.