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Refraction law:
For a wavefront travelling by a boundary among two media, the first along a refractive index of n1, and the other with one of n, the angle of incidence theta is associated to the angle of refraction phi by
n1 sin theta = n2 sin phi.
What are a quarter wave plates? Get the expressions for its thickness in terms of refractive indices for E-ray, O-ray and wavelength?
WORKING OF TERRESTIAL TELESCOPE
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a boy throws a ball of mass 20 kg vertically upwards.it raises to a maximum height of 100 m.at what height will the kinetic energy be reduced to 70%
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