How can a Photon possess momentum without having mass?

Subject: How can a Photon possess momentum without having mass?

Date: Sat Apr 18 08:30:31 1998
Posted by P.Karthik
Grade level: undergrad
School: No school entered.
City: Madras State/Province: No state entered.
Country: India
Area of science: Physics
ID: 892906231.Ph

Message:


By the De-Broglie relation (p=h/lambda) we can find the momentum of a 
photon.But we also know that the photon is massless(or every light 
source would lose mass as photons are emitted).How is it possible for 
a particle to have a momentum but not mass?

Re: How can a Photon possess momentum without having mass?

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