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24th Jan 2011

Why does light bend under gravity?

Diana O'Carroll

Making photons identical. A multi-photon down-conversion source in Bristol.

Light is supposed to be massless so how is it that gravity makes a beam bend? Plus, we ask what the hand wash adverts mean when they claim to "kill 99.9% of known germs."

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How can light bend?

If light has no mass, and gravity is a property of mass - then how is light bent by gravity?

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