Recent content by lfigo170

But according to general relativity the speed of any massive body should be changed in a gravitational field.

thanks for replies but i found my answer photon will be changed into Tachyon http://en.wikipedia.org/wiki/Tachyon

Consider a photon moving in same direction with a gravitational field . So the speed of photon must become greater than speed of light. how its possible ? please answer this then I'll ask my next questions. :smile: