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Q & A: photons and pure energy

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Most recent answer: 03/28/2020
Q:
Like photon said to be pure form of energy is there any pure form of mass
- Anonymous
A:

Saying that photons are "pure energy" is a bit misleading. They have momentum and angular momentum as well, and they interact wih some other fields (charged particles) but not all. So they have lots of specific features beyond just energy.

Likewise, no known field corresponds to simple mass with no other particular properties. Even black holes have angular momentum and electric charge.

Mike W.


(published on 03/28/2020)

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