Viewing a single comment thread. View all comments

Greyswandir t1_jcqy10v wrote

Reply to comment by neuromat0n in What decides which wavelength to reflect and which one to be absorbed in an object? by TheSimpleHumans

Ok, it’s been a while since it took physics so if I’m wrong someone can correct me:

No, moving charge doesn’t have kinetic energy because it has no mass. The link between photon frequency and energy is called the Planck Relation.

1

neuromat0n t1_jcr22ep wrote

> No, moving charge doesn’t have kinetic energy because it has no mass.

I dont think there is a charge that has no mass. Light is not considered having a charge, protons and electrons are, and those have mass. Maybe I should have said 'charged particle' but it should be synonymous. Your link unfortunately does not answer the question.

1

Greyswandir t1_jcr96h8 wrote

Sorry, brain fart above and I typed the wrong thing: I means that a photon does not have kinetic energy because a photon has no mass.

Hopefully someone with more knowledge can jump in, but I don’t know that there’s an intuitive reason why Planck’s Relation is true. I think it’s a relationship derived from the Schrödinger Equation and Einstein’s work on relativity and then extensively measured and confirmed since then.

1