Photon Rest Mass: Understand 4 Momentum & Mass

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Start date Dec 13, 2014
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smk222

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Dec 13, 2014

i read some where that four momentum of photon is null vector that's why photon have zero rest mass.but i cannot get it.please help

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Dec 13, 2014

smk222 said:

i read some where that four momentum of photon is null vector that's why photon have zero rest mass.but i cannot get it.please help

https://www.physicsforums.com/threads/four-momentum-of-a-photon.308273/

Photon Rest Mass: Understand 4 Momentum & Mass

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Photon Rest Mass: Understand 4 Momentum & Mass

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