system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does light have momentum if photons have no mass? Momentum is mass times the acceleration (p=mv), so something with no mass should have zero momentum.
gpt
Well because p=mv isnt the only way to describe momentum. De Broglie said that p=h/lambda, with lambda being the de Broglie wavelength. Waves can have momentum without mass, as they still travel through space and can act on other matter/waves/fields.