Astr 221 November 24, 2003: Metrics and Blackholes  

Metrics and Schwarzchild

Polar coordinates

Question: How can we tell that this describes a spherically symmetric situation?

Proper Distance

Proper time intervals

Black Holes

Falling into a black hole

Question: Verify that the Special relativity time dilation formula works to make signals arrive further apart for a distant observer

Question: Now verify that the Gravitational time dilation goes in the same direction

Frozen in time

Schwartzchild metric

Question: How might the Universe appear?

Question: How might we detect an object that is so massive that light can not escape from it?

Detecting Black Holes