Suppose that events $A$ and $B$ are spacelike separated. Also suppose that events $B$ and $C$ are spacelike separated. Does this guarantee that $A$ and $C$ are spacelike separated? That is, is the relation of spacelike separation transitive? Thank you.

I want to compute the commutation relation between a function of momentum and a function of space in Quantum Mechanics. I know the commutation relation between momentum and a function of space but how can I compute the commutation relation between functions of momentum $p$ and space $x$? Some thi...

An electromagnetic wave is typically shown with this schematic (taken from https://en.wikipedia.org/wiki/Electromagnetic_radiation ) We see graphically from the schematic that the amplitude of E and B is is evolving with position and time. Thus, should we consider that the electromagnetic wave ha...

When I was studying motion, my teacher asked us to derive the equations of motion. I ended up with the derivation for fourth equation of motion also. My teacher said this is not an equation. I am asking if this proof is correct for the equation? $$ v^2-u^2 = 2ax $$ $$ (v+u)(v-u) = 2 (\frac{v-u}{t...