A102 Review Problems

2003 February 12

These problems are not due as homework. They are here for your own studying purposes. Solutions are available in PDF format.

(Some of these questions involve topics that will be discussed in class on Friday February 14 and Monday February 17.)

This set of problems is easier some of the problems from last week's review session, and are more akin to the sort of thing that might be asked on a test.

1. Chapter 12, Question 1 in the text.

2. Chapter 12, Question 4 in the text.

3. Chapter 12, Question 10 in the text.

4. Chapter 12, Questions 13 and 14 in the text. (Do both; you need the answer of 13 to do 14.)

5. Consider two telecopes: the lab telescope, whose aperture has a diameter of 8 inches, and the Hale telescope at Palomar Observatory, whose aperture has a diameter of 200 inches.

   • (a) If you measure the flux of a star with the Hale telescope to be f, what would you measure the flux of the same star to be with a lab telescope? (In other words, what is the ratio of the flux observed by the Hale telescope to the flux observed from the same star by a lab telescope.)
   • (b) How long will it take the lab telescope to collect the same total amount of energy as the Hale telescope collects in one second?

6. Consider two stars of the same luminosity. Star A has a temperature which is twice the temperature of Star B. What is the ratio of the radius of Star B to the radius of Star A?