« on: 11/02/2020 23:36:58 »
I understand c is a constant, you lost me making v a constant. I want v arbitrarily close to the speed of light with time slowing more the closer you get.Well, in a nice frame where Earth is moving at .999c, time is certainly dilated here, but that doesn't make the speed of light different as we measure it with our dilated clocks. In other words, Earth is already moving (v) at arbitrarily close to c. Is that what you wanted?
I'm not familiar with adding energy to light using mirrors. You get more light energy out than you put in?Both the gravity assist thing and the mirror thing are frame dependent changes in the energy of the light, but yes, in a frame where the mirror is moving towards the source of the light, the reflected light is blue shifted, having taken kinetic energy from the mirror. Ditto with the slingshot scenario. The exact same situation in a different frame (where say the same mirror is receding from the light source) results in a red-shift of the light, and hence lower energy.