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Results tagged with photons
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user 265247
The photon is the quantum of the electromagnetic four-potential, and therefore the massless bosonic particle associated with the electromagnetic force, commonly also called the "particle of light". Use this tag for questions about the quantum-mechanical understanding of light and/or electromagnetic interactions.
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How do photons affect each other gravitationally?
The amplitude, given the momentum of the two photons $k_{1}$ and $k_{2}$, in the limit where the graviton propagator momentum $q \rightarrow 0$ behaves proportionally to
$$\sim \frac{(k_{1} \cdot p_{1} … )(k_{2} \cdot p_{2})}{q^{2}}$$
This means that two photons that are moving in the same direction do not interact gravitationally. …
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