Shortcut Methods
JEE Main & Advanced Quick Review
Polarisation
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Malus’ Law: $$I = I_0 \cos^2 \theta$$
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Brewster’s Law: $$\tan \theta_p = n$$
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Polarisation by Reflection: The polarising angle for a dielectric surface can be calculated using Brewster’s law.
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Polarisation by Scattering: The scattered light can be polarised. The degree of polarisation depends on the scattering angle and the size and shape of the particles.
CBSE Board Exams Quick Review
Polarisation
- Types of Polarisation:
- Linear
- Circular
- Elliptical
- Polarising Materials:
- Polaroid sheets
- Calcite crystals
- Applications of Polarisation:
- Polarising sunglasses
- 3D movies
- Microscopes
- Telescopes
- Polarisation by Double Refraction:
- Extraordinary and ordinary rays
- Calcite crystal as an example
