Parameters for telescopes Flashcards
1
Q
Image scale
A
An object with an angular size theta has an image on the focal plane of size s P = θ/s = 1/f
2
Q
Collecting area
A
Area of main mirror or lens A = (πd^2)/4
3
Q
Focal ratio
A
Defined as the ratio of the focal length f to the diameter d
4
Q
Differences in focal ratio
A
Smaller means brighter but less detail
Larger means duller but more detail
5
Q
Resolution
A
Ability to distinguish two sources of light very close together
