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Results tagged with mass-energy
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user 277718
The special-relativistic relation connecting energy with mass, $ E^2 - (m c^2)^2= (pc)^2 $. May be used to provide accounting constraints in energy and momentum, both conserved in total, even in reactions where $m$ is not.
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Why do people say we need general relativity in order to explain why light is affected by gr... [duplicate]
I've heard said by many physicists things along the lines of "Since light has no mass, we need general relativity to explain why light is affected by gravity."
But why is this necessary?
We know that …
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