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If light travels in same direction always as it goes further, Then how it bends near black holes. Is it really bends or we just see it as a result of reflection.
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Explanation:
The bending of light as it passes from one medium to another is called refraction. The angle and wavelength at which the light enters a substance and the density of that substance determine how much the light is refracted. ... The bending occurs because light travels more slowly in a denser medium.
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