Hey everybody. If I have a moving plane reflector with incident planar e&m waves, there is a Doppler shift in the reflected e&m wave, correct? So if the reflector is moving in the direction of the wave propagation, then the reflected waves are lower frequency then the incident waves. Therefore, the reflecting plane has absorbed energy from the wave, and heats up. Am I correct up to this point? Now, if you goto a frame where the plane is at rest, the reflected waves have the same energy as the incident, and the plane does not heat up. Can someone explain this to me from a relativity perspective?