Electromagnetic Radiation Study Guide
Choose the best answer. Some statements may have more than one correct answer.
1. The transfer of energy by electromagnetic wave is called _____________________.
a. Modulation
b. Radiation
2. Infrared radiation has a wavelength slightly longer than ______________________.
a. Microwaves
b. Visible light
3. ______________________ can be used for cooking.
a. Microwaves
b. Infrared
4. ______________________ radiation has a higher frequency than visible light.
a. Ultraviolet
b. Infrared
5. Photons are tiny bundles of radiation that have no ___________________________.
a. Mass
b. Energy
6. Objects containing heat can emit ____________________________.
a. X rays
b. Infrared radiation
7. ______________________ have the lowest photon energy.
a. Radio waves
b. Gamma rays
8. Radio waves are radiation with very long ______________________ and very low
frequencies.
a. Wavelengths
b. Photons
9. ___________________________ have the highest frequency of all electromagnetic
radiation.
a. X rays
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Electromagnetic Radiation Study Guide
b. Gamma rays
10. Electromagnetic waves are classified according to their wavelengths on the
electromagnetic ______________________.
a. Photon
b. Spectrum
11. ____________________ Can be used to check for broken bones.
a. X-rays
b. Infrared rays
12. Ozone in Earth’s atmosphere blocks most of the sun’s_____________________.
a. Ultraviolet rays
b. Infrared rays
13. Visible radiation is the only part of the electromagnetic spectrum you can
_____________.
a. See
b. Feel
14. Information can be impressed upon a radio wave by a process called
___________________.
a. Radiation
b. Modulation
15. _____________ are a subset of radio waves with the highest frequency and energy.
a. Gamma rays
b. Microwaves
16. The wavelength of an electromagnetic wave is _________________.
a. Directly proportional to its frequency
b. Inversely proportional to its velocity
c. Inversely proportional to its freqyency
d. Directly proportional to its energy
17. In a vacuum, all electromagnetic waves have __________________.
a. The same frequency
b. The same velocity
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Electromagnetic Radiation Study Guide
c. The same wavelength
d. The same energy
18. Al electromagnetic radiation in the optical portion of the electromagnetic spectrum
______.
a. Is visible
b. Has the same wavelength
c. Has the same frequency
d. Penetrates the earth’s atmosphere.
19. Compared to the photons of violet light, the photons of red light _________.
a. Have more energy
b. Have less energy
c. Have equal energy
d. Have a longer wavelength
20. Compared to radio waves, microwaves have __________.
a. Shorter wavelengths
b. Photons with more energy
c. Higher frequencies
d. Lower frequencies
21. Compared to gamma rays, X rays have _________.
a. Longer wavelengths
b. Higher frequencies
c. Photons with more energy
d. Lower frequencies
22. We perceive infrared waves as _____.
a. Visible Light
b. Warmth
c. Smell
d. Coldness
23. All objects emit
a. Gamma rays
b. Light
c. Electromagnetic waves
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Electromagnetic Radiation Study Guide
24. Arrange the regions of the EM spectrum in order of increasing energy.
25. Which regions of the EM spectrum are completely absorbed by the atmosphere
26. Why would we place a optical telescope in space?
27. Why do we place gamma and x-ray telescopes in space?
28. Which region of the EM spectrum is responsible for most communication?
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Electromagnetic Radiation Study Guide
1. Sound waves from a radio generally travel in which medium?
a) Air
b) Earth
c) Light
d) Water
2. The speed of a sound wave
a) Depends on wavelength
b) Depends on the medium
c) Depends on amplitude
d) None of the above
3. Longitudinal waves travel quickly in a ____________ because the molecules are closely
packed and physically bonded together.
a) Liquid
b) Gas
c) Solid
d) Plasma
4. Light waves
a) Require a medium.
b) Cannot travel through solids.
c) Cannot travel through liquids.
d) Are electromagnetic waves.
5. Light waves are
a) Transverse waves.
b) Longitudinal waves.
c) Rotating waves.
d) Circular waves.
6. The color of light is determined by the _________ of the light waves.
a) Medium
b) Speed
c) Frequency
d) Amplitude
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Electromagnetic Radiation Study Guide
7. Which type of electromagnetic waves has the highest energy?
a) Gamma rays
b) Ultraviolet rays
c) Infrared
d) Microwaves
8. Which type of electromagnetic radiation is used to kill cancer cells?
a) Microwaves
b) Gamma rays
c) Ultraviolet rays
d) Sunlight
9. Radar works by sending a signal out from an air-traffic control tower that is
a) Analyzed by a Doppler scanner on the ground.
b) Reflected off a plane back to the control tower.
c) Increased in intensity as it passes through the atmosphere.
d) Scanned and analyzed by a receiver on board an airplane.
10. Light demonstrates wave characteristics when it is
a) Reflected.
b) Refracted.
c) Diffracted.
d) All of the above.
11. Light demonstrates particle characteristics when it
a) Knocks electrons off a metal surface.
b) Passes through a narrow opening.
c) Forms standing waves.
d) All of the above.
12. As the frequency of light waves increases,
a) The energy increases.
b) The energy decreases.
c) The energy stays the same.
d) The wavelength increases.
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Electromagnetic Radiation Study Guide
13. The law of reflection says the angle of incidence is ___________ the angle of reflection.
a) Greater than
b) Less than
c) Equal to
d) None of the above
14. Light is composed of waves and particles called
a) Electrons.
b) Quarks.
c) Photons.
d) Waves.
15. The visible spectrum of light from the longest to shortest wavelength is:
a) Violet, indigo, blue, green, yellow, orange, red
b) Infrared, ultraviolet, gamma, x-rays, microwaves
c) Red, orange, yellow, green, blue, indigo, violet
d) Green, orange, red, violet
16. When the crest of one wave overlap the crests of another wave, this results in
a) Diffraction.
b) Destructive interference.
c) Constructive interference.
d) Resonant frequencies.
17. An echo is the result of a
a) Reflected sound wave.
b) Diffracted sound wave.
c) Refracted sound wave.
d) Dispersed sound wave.
18. What happens to a wave when it is refracted?
a) It is bent
b) It is diffracted
c) It is reflected
d) It is radiated
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