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Venus looks brighter than other stars, due to
(a)Atomic fusion takes place on its surface
(b)It is closer to the earth than other stars
(c)It has higher density than other stars
(d)It is heavier than other stars

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Important Questions on Wave Optics
EASY
Which of the following are true?
A. Speed of light in vacuum is dependent on the direction of propagation.
B. Speed of light in a medium is independent of the wavelength of light.
C. The speed of light is independent of the motion of the source.
D. The speed of light in a medium is independent of intensity.
Choose the correct answer from the question given below :

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On a hot summer night, the refractive index of air is the smallest near the ground and increases with a height from the ground. When a light beam is directed horizontally, the Huygens' principle leads us to conclude that as it travels, the light beam,


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Deduce Snell's law of refraction for a plane wave using Huygens' principle.

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HARD


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