Could you please give me some brief explanation of the attraction of light by gravity. Or maybe some links where I can read something about it. :)
close...the speed of light doesnt change but its is redshifted, for example, lets say light was escaping the gravitational field of a large star, the light would have to do work to escape it (its force of gravity) so it would use up some of its energy, therefore lowering the frequency. so having the frequency lowered the colour you observer will be more to the left side of the em spectrum then it actually is.Larry717 said:I once read that light is slowed down by a gravitational field.
Later, I read that spacetime contorts and c remains the same.
Which is true?