General Astronomy -
Spring 2014
Homework #9 - not due March 28
1. (3 pt) Explain the
equivalence principle.
2. (2 pt) What is the
Schwarzschild radius of a 100 solar mass black hole?
3. (4 pt) The accretion disk around a black hole has a luminosity
of 1033 W. What can one say about the black hole?
4. (6 pt) An AGN
ejects two blobs of matter moving in diametrically opposite
directions inclined by 30° to our line of sight to the AGN.
Each blob is moving at a speed of 0.95 c relative to the
AGN. The AGN is at rest relative to us. How fast do
the blobs appear to move on the sky as seen by us?