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Please DO NOT Write On This Test
Electromagnetic Radiation and Telescopes Test
1. The largest telescope ever constructed was a
a.) Reflecting telescope.
b.) Refracting telescope
c.) Radio telescope
d.) Newtonian telescope
2. Which of the following is NOT true of light?
a.) Light can behave as a particle or as a wave.
b.) Light particles are called photons
c.) We can see all wavelengths of light
d.) Light is a form of energy
3. The amount of energy a photon carries depends on
a.) Its wavelength and frequency
b.) The speed it travels
c.) How close it is to earth
d.) All of the above
4. Which of the following properties of a telescope is LEAST important?
a.) Resolution
b.) Magnification
c.) Aperture (light collecting power)
5. Waves with higher energy tend to have
a.) Shorter wavelengths and high frequencies
b.) Shorter wavelengths and low frequencies
c.) Longer wavelengths and high frequencies
d.) Longer wavelengths and low frequencies
6. What is the shortest wavelength of light that may be seen with the human eye?
a.) Red
b.) Yellow
c.) Green
d.) Blue
7. Astronomers build telescopes on tops of mountains because
a. there is less air to blur the light
b. there is less light pollution
c. all of the above.
8. The Very Large Array is
a. the highest resolution optical telescope ever built.
b. is a matched pair of 8 m telescopes in Hawaii.
c. is an space-based infrared telescope.
d. is a group of radio telescopes linked together electronically to provide high resolution.
9. The ________ of a telescope is a measure of its ability to show fine detail.
a. resolving power
b. light-gathering power
c. focal length
d. magnifying power
10. Which of the following types of electromagnetic radiation has the lowest frequency?
a. x-rays
b. visible light
c. radio
d. gamma rays
e. infrared radiation
11. The diagram shows a ________________ telescope.
a. refracting
b. Cassegrain reflector
c. radio telescope
d. Newtonian focus
12. Which wavelengths are shorter than visible light?
a. infrared radiation
b. microwaves
c. radio waves
d. x-rays
13. Which of the following types of electromagnetic radiation has the lowest energy?
a. x-rays
b. visible light
c. radio
d. gamma rays
For #14- 20, write the type of electromagnetic radiation that matches each wavelength.
#14
#15
#16
#17
#18
#19
#20
Matching: for #21- 26, write the correct vocabulary term on your answer sheet
frequency
light pollution
magnifying power
objective lens/mirror
photon
primary lens/mirror
reflecting
refracting
wavelength
resolving power
secondary mirror
hertz
21. A ___________ telescope forms an image by bending light with a lens.
22. The main large lens or mirror of an optical telescope is called the ______________.
23. The distance between successive peaks of a wave is called a(n) __________.
24. ___________ is a telescope that uses a concave mirror to focus light into an image.
25. A ________ is a quantum (particle) of electromagnetic radiation that carries energy.
26. Waste light from cities and outdoor lighting which prevents the observation of faint objects from the
cosmos is referred to as _____________.
27. See answer sheet…
Name______________________________________
Period_________
Electromagnetic Radiation and Telescopes Test
Multiple Choice:
The Electromagnetic Spectrum:
1. _______
14. ______________________________
2. _______
15. ______________________________
3. _______
16. ______________________________
4. _______
17. ______________________________
30
5. _______
18. ______________________________
6. _______
19. ______________________________
7. _______
20. _____________________________
8. _______
9. _______
Matching:
10. _______
21. ______________________________
11. _______
22. ______________________________
12. _______
23. ______________________________
13. _______
24. ______________________________
25. ______________________________
26. ______________________________
Short Answer:
30. Explain two criteria to consider when choosing potential targets for study by a specific telescope.
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