I was watching an interesting article on string theroy on TV the other night and they said (not sure if it was theroy or fact) that, the speed of light and gravity work at the same speed. eg gravity pulls light towards the source but the light is travelling fast enough to counter gravity, thus leading to the light being stationary. This got me thinking if this statement is true how come we cant see black holes? Surly we would be able to see some light if both work at the same speeds. Clarification on whether the statement is true or not would be of help aswell. Thx heaps.