Telescope Review

1

• What are the five types of Electromagnetic Radiation?

• How is the type of radiation related to energy?

• How is wavelength related to frequency?

2

• Why does the red shirt that Sean is wearing appear red to you?

• How could you make it look black while his blue pants still look blue?

3

• Why can’t I see a dim star at night?

• What can I do naturally to allow me to see it?

4

• Why can’t Superman see arm bones?

• Where could he see his bones?

5

• What is the function of:– Cornea– Lens– Retina– Iris– Fovea

6

• What is the advantage of a reflector over a refractor?

• What is the disadvantage?

7

• Why is “THE BIGGER THE BETTER” true for telescopes?– 1

– 2

8

• What does the spectrum of a star tell astronomers? – 1

– 2

– 3

9

• How is a 20 inch telescope better than a 10 inch telescope?– 1

– 2

10• What is AO and why is it useful?

– Adaptive Optics and Active Optics

10Adaptive

Optics

11

• What is Chromatic Aberration and how do astronomers get rid of it?

• What is Spherical Aberration and how do astronomers get rid of it?

12

• Why are the Gemini, Keck, Subaru, and a couple other telescopes located on Mauna Kea?– 1

– 2

– 3

13

• Why is the Hubble, Chandra and other space-based telescopes located in space? – 1

– 2

14

• How has observational astronomy advanced a lot in the last twenty years?– 1

– 2

15

• How much better is a 20 inch telescope than a 5 inch telescope?– Light Gathering Power

– Resolution

16

• What type of objects do astronomers look for in the infrared spectrum?– 1

– 2

– 3

17

• Why is the sun red when it is near the horizon?

• Why is the sky blue?

• What color is the day sky on the moon?

18

• Why are radio telescopes very large?– 1

– 2

19

• Which has the better light gathering ability and which has the best resolution.

20

• What is the resolution of a 25 cm telescope?

• What is the light gathering ability of a 25 cm telescope?

21• Why is the flag waving in the wind?• Why is the sky black during the moon day?

22Why do refractors tend to be very long?

23What are the best seeing

conditions possible?• 1• 2• 3• 4• 5• 6

What is the significance of the L2 location?

FINI