Hello everyone, Although there are lots of things that I know about light, I have trouble really understanding it. I can't visualize a wave that doesn't need a medium to move. Photons are electrically neutral, so how is the thing with vertical and horizontal oscillating electric and magnetic fields happen? Everything that I've learned in the school seems to be just repetitions of subconscious memorisations. Thank you Note: I know this is a frequenly asked question, but other threads couldn't help me understand.