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Yogita Ingle 5 years, 9 months ago
Huygen's Principle:
(i) Every point on a given wave front (called primary wave front) acts as a fresh source of new disturbance, called secondary wavelets which travel in all directions with the velocity of light in the medium.
(ii) The forward envelope of these secondary wavelets gives the new wave front at any instance.This is called secondary wave front.
Consider a plane wavefront AB incident on a surface PQ separating two media 1 and 2.
The medium 1 is a rarer medium of refractive index n1 in which light travels with a velocity C1 The medium 2 is a denser medium of refractive index n2 in which light travels with a velocity C2.
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Yogita Ingle 5 years, 9 months ago
Coulomb’s Law
Coulomb’s law states that Force exerted between two point charges:
- Is inversely proportional to square of the distance between these charges and
- Is directly proportional to product of magnitude of the two charges
- Acts along the line joining the two point charges.
Posted by Jyoti Arya 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Brewster’s law:- Brewster’s law states that at any particular angle of incidence, reflected ray is completely polarized; and the angle between reflected and refracted ray is 900.
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