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Re: Light vs neutrons - aren't all that different? (Reply)
Re: Light vs neutrons - aren't all that different?
Date:
2020-08-11 06:49 pm (UTC)
From:
sassa_nf
That formula is incomplete.
E = m×c
2
is true only for bodies at rest. A photon is moving, so you can't use that formula.
The full formula is:
E
2
= m
2
×c
4
+ p
2
×c
2
, where p is the momentum. (When the body is not moving, p is zero, and you get the former formula)
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Re: Light vs neutrons - aren't all that different?
Date: 2020-08-11 06:49 pm (UTC)E = m×c2 is true only for bodies at rest. A photon is moving, so you can't use that formula.
The full formula is:
E2 = m2×c4 + p2×c2, where p is the momentum. (When the body is not moving, p is zero, and you get the former formula)