- #1
craigthone
- 59
- 1
For Schwarzschild geomery
$$ds^2=-(1-\frac{2GM}{r})dt^2+(1-\frac{2GM}{r})^{-1}dr^2+r^2d\Omega^2$$
For a Schwarzschild observer , the proper time and coordinate time are related by
$$d\tau=(1-\frac{2GM}{r})^{1/2}dt$$
There is a often used relation between proper time and coordinate time
$$d\tau \sim \exp(-\frac{t}{4GM}) dt$$
I do not know how to relate the two relation, i.e. representing position ##r## in terms of coordinate time ##t##. Are there any suggestions?
$$ds^2=-(1-\frac{2GM}{r})dt^2+(1-\frac{2GM}{r})^{-1}dr^2+r^2d\Omega^2$$
For a Schwarzschild observer , the proper time and coordinate time are related by
$$d\tau=(1-\frac{2GM}{r})^{1/2}dt$$
There is a often used relation between proper time and coordinate time
$$d\tau \sim \exp(-\frac{t}{4GM}) dt$$
I do not know how to relate the two relation, i.e. representing position ##r## in terms of coordinate time ##t##. Are there any suggestions?