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Re: Does Light Have Weight?

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Posted by Young Lee on September 19, 1997 22:05:54 UTC

: : : : : I would like to know whether light consists of particle and whether it has weight. : : : Hope you can help.

: : Yes I believe light does have weight. (More correctly , mass) The proof is the black hole(not quite proof, since black holes have not been proven, but are considerded very likely).I flight did not have any mass at all, it would not be effected by any gravitational field, no matter how great

: Just because light is (in theory) effected by a black hole, that doesn`t prove that light has mass. And if light has no mass, it doesn`t mean it isn`t effected by gravity. The gravity in a black hole is so immense that it `warps` space. Anything passing through that space will also : become warped. Therefore as long as the space has been warped an object with no mass can also become warped.

I believe this can be clarified by considering the notion of momentum. Photons do have momentum which adhere to the laws of space-time (and hence gravity or the "space-time warp"). Photons do have a rest mass (I think as prescribed by E=mc^2 -- please correct me if I am wrong) however, light does not have a true mass.

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