Discover Questions

How can space be filled with Photons if photons don't have a volume? Can anyone help with the angle? I'll tried to figure this out but can't seem to get it. If someone could please help.? Find the energy of the photon required to excite a hydrogen atom from the n=1 state to the n=5 state.? Find Z and IT in a parallel circuit if R = 2.7k ohms and C = 330 pF when f = 50 KHz and V =4V / 0°.?