Download Astronomy 100 Chapter 5 Classwork/Homework Answers 1. Which

Astronomy 100 Chapter 5 Classwork/Homework Answers
1. Which of the following electromagnetic waves can be observed from ground based telescopes? Which can
be observed from space based telescopes? Check all that apply.
Wavelength Band On Ground? In Space?
Radio
X
X
Ultraviolet
X
Visible
X
X
X-ray
X
Infrared
X
Gamma
X
2. Indicate whether the description is for a reflecting telescope, a refracting telescope, or both.
Reflector Refractor
Large lens
X
Bounces light
X
Causes light rays to converge
X
X
May produce rainbow around image
X
Bends light
X
Large mirror
X
Magnifies image
X
X
May produce fuzzy image
X
3. Sketch the light rays for a basic refractor.
4. Adaptive optics is the use of a computer to adjust for atmosphere distortions by altering the curvature of
mirrors.
Extra Credit: (2 Points Each)
Ciardi, T
Answers
HW C5
A. Compare
LGP (Keck) = (10 m)2 =
100
= 1,562,500
2
LGP (Eye)
(0.008 m)
0.000064
The Keck telescope has more than 1.5 million times greater LGP than your eye.
B.
α = 2.06 x 105 x 550 x 10-9 m = 0.4532 arcseconds
0.25 m
This resolution will allow you to see any double stars with a separation equal to or greater than 0.4532
arcseconds. We would be able to see the two stars.
Ciardi, T
Answers
HW C5