Last Half Of Chapter 5 Flashcards
1
Q
What are some solutions to fix atmospheric seeing?
A
- High altitude telescopes
- active or adaptive optics
- put telescopes in space
2
Q
What is active optics?
A
Controlling mirrors based on temperature and orientation
3
Q
What is adaptive optics?
A
Tracking atmospheric changes with a laser and adjusting the mirrors in real time
4
Q
What are some characteristics of radio telescopes?
A
- similar to optical reflecting telescope
- less sensitive to imperfections (longer wavelengths)
- Can be made very large
5
Q
What Is a bad part of longer wavelengths?
A
Poor angular resolution
6
Q
What are some advantages of radio astronomy?
A
- can observe 24 hours a day
- weather does not interfere
- not effected by astronomical dust
- different frequencies give us different results
7
Q
What is interferometry?
A
It is combining info from several widely spread radio telescopes
8
Q
What kind of radiation can block visible radiation?
A
Infrared
9
Q
What kind of rays will not reflect off mirrors?
A
X and gamma rays
10
Q
What rats can’t be focused?
A
Gamma rays
