Up till now I have thought that Hawking radiation would be mostly photons, since the temperatures are typically small. However, a comment on another question (thanks to John Doty) suggested that we should also consider other species of low rest mass. So my question is: could Hawking radiation hav...

I understand that there is no NEED for a fourth dimensional space to bend into, but why do physicists seem to be AGAINST the idea? Is this simply because there is no PROOF of a fourth dimension, or is there some sort of evidence AGAINST a fourth dimension? Wouldn't it be simply to assume there is...

In the double-slit experiment, when an electron reaches the detector after passing through the holes, it has a certain momentum which we can measure with arbitrary accuracy. From this data, we can calculate what momentum the electron had when it was passing through the hole. So we can know the el...

Assumptions I will be working in one spatial dimension throughout. It should be possible to generalise to three dimension with relative ease but doing so adds little to the conversation, only serving to make calculation more difficult. Elementary particles are necessarily without any measure or...

If we write out Maxwell's equations with magnetic charges, we get $$ \begin{align} \nabla \cdot \mathbf{E} &= 4 \pi \rho_e \\ \nabla \cdot \mathbf{B} &= 4 \pi \rho_m \\ -\nabla \times \mathbf{E} &= \frac{\partial \mathbf{B}}{\partial t} + 4 \pi \mathbf{J}_m \\ \nabla \times \mathbf{B} &= \frac{\p...