1) While important, this property of a telescope is the least of its three most important properties: _______________________
2) Which property of the telescope would be very important if you wanted to look at a distant (dim) star or object? ______________________
3) A poor quality telescope would produce images that are too dim for you to see. You could determine whether it would be good or bad by calculating its ___________.
4) If you wanted to be able to see a double star as two stars instead of one, you would want a telescope with good __________
D. light gathering power