If light doesn't need a medium to travel; it can travel through vacuum, thin how light can't travel inside a black hole (black hole has no medium)?
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light does not need medium to travel.it travels from sun to earth where medium is absent.black hole is a sun where heatvis completed
it has an escape velecoity more than velocity of light so light does not escape from black hole so it appears black!!!!!
it has an escape velecoity more than velocity of light so light does not escape from black hole so it appears black!!!!!
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