3 ms·
> Photon cannot change it's direction without interaction with something to exchange momentum. Doesn't the entire photon simply exchange momentum with the star
by LegionMammal978 2y ago
> Photon cannot change it's direction without interaction with something to exchange momentum.
Doesn't the entire photon simply exchange momentum with the star, without needing to invoke any higher-order effects? Just as the star exerts a gravitational pull on the entire photon, the entire photon exerts a (very miniscule) gravitational pull on the star.
- oneshtein 2y agoPhoton is massless, so it cannot use the same physical process as non-massless particles. For example, when photon will aim at a object, it will not «fall» and increase it speed, like a regular particle.