), sketch what a 5 meter diameter mirror
with a focal length of 2 meters would look like (do some calculations to
make your sketching realistic). Do you see the problem?
1) What resolution would you need to be able to see that person standing on the Moon was waving at you here at College Park? Tell me what criteria you are using to establish that the person is waving.
2) Compare the light gathering power of the human eye to that of a 1-meter telescope. Assuming the human pupil can expand to a maximum diameter of 5 millimeter, how many times more light can the 1-meter telescope collect?
3) Most optical telescopes have mirrors whose focal lengths are 3-5
times the diameter of their primary mirrors, called f = 3 to 5.
This is because it is hard
to build very ``fast'' mirrors, i.e. mirrors with very short focal
lengths. Using the equation of a parabola (y = A X2) and its focal
length (focal length = ), sketch what a 5 meter diameter mirror
with a focal length of 2 meters would look like (do some calculations to
make your sketching realistic). Do you see the problem?
4) Do #1 in the Thought Questions section of Chapter 10.
5) Do #5 in theThought Questions section of Chapter 10.
6) Do # 8 in the Problems section of Chapter 10.