Homework 06

Please answer at least 4 of the following 5 questions correctly for full credit:

Question 1

Explain the difference between proper, true, and radial motion.

Question 2

How do we measure the radial motion of a star?

Question 3

What measured quantities of a star do we need to deduct the size (radius) of a star?

Question 4

How do we measure the temperature of a star?

Question 5 (the quantitative one...)

If the radial motion of a star is 300km/sec and its proper motion is 400km/sec, what will be the speed of its true motion?

Please submit your answer as plain test in the main message body of an e-mail to kai-1060-hw@physics.utah.edu before midnight (MST) on March 6,2008. Plain text in the main message body of your e-mail means no attachments!!!

Last modified: Fri Feb 29 14:27:48 MST 2008