Mass of Electrons and Photons

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Chris Dis3L
Posts: 45
Joined: Fri Sep 28, 2018 12:25 am

Mass of Electrons and Photons

Postby Chris Dis3L » Thu Oct 11, 2018 6:05 pm

Do photons have mass? We know that light feels the effects of gravity similarly to matter. We also know that when an excited electron drops down an energy level, the electron emits energy in the form of light. If photons have mass, then wouldn't that mean that when an excited electron drops to lower energy levels it would lose mass because it is giving off photons?

cara_cavarretta_3F
Posts: 32
Joined: Fri Sep 28, 2018 12:23 am

Re: Mass of Electrons and Photons

Postby cara_cavarretta_3F » Thu Oct 11, 2018 6:06 pm

Traditionally and from what is required of us in this course, photons are considered massless.

janeane Kim4G
Posts: 31
Joined: Fri Sep 28, 2018 12:28 am

Re: Mass of Electrons and Photons

Postby janeane Kim4G » Thu Oct 11, 2018 6:30 pm

Agreed, the simple answer is that it is massless but with momentum and energy.


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