Chapter 6

Question 1

What is a refracting telescope?

Answer 1

It uses a lens to concentrate light at a focal point (bends light).

Question 2

What is a reflecting telescope?

Answer 2

It uses a curbed mirror to concentrate light at a focal point.

Question 3

What is chromatic aberration?

Answer 3

When the lens focuses different wavelengths of light at different points. (refractors)

Question 4

What is the main function of a telescope?

Answer 4

To collect light and focus it.

Question 5

What is the telescope area?

Answer 5

A = piD^2 / 4

Question 6

What is angular resolution?

Answer 6

The smaller an angle between two object that can be separated, the better the resolution of the telescope.

Question 7

What is the angular resolution formula?

Answer 7

alpha ~ wavelength/D

Question 8

What telescopes are better?

Answer 8

Larger ones (with smaller angles)

Question 9

What is telescope magnification?

Answer 9

magnification = focal of objective lens/ focal of eyepiece (long focal of eyepiece = small image)

Question 10

What is atmospheric blurring?

Answer 10

Due to movements of air pockets (seeing)