Recent content by Musant

But you might find that the two things 'amount' to the same.

I apologize if that wasn't clear. The units of c are, for example, in meters per second. Time dilation affects the length of a second. We assume that light always travels the same number of meters per second in a vacuum. So if the second is longer, then light would travel a greater number of...

The time dilation factor I had seen previously, and the one I usually consider is simply SQRT(1-2GM/(rc^2)). Question for you: In a time dilated reference frame where the time units of c are dilated, shouldn't one also expand units length such that c remains constant? If so, wouldn't the radius...

So the claim is that even with a difference in mass density on the order of 10^8 between the region of the core of the galaxy and the solar neighborhood for example, the difference in time dilation and length expansion is negligible. Hard to believe.