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1 | |
What is light?
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| | A) | Light is radiant energy in the form of a stream of energy particles, called photons.
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| | B) | Light is radiant energy in the form of a wave of electromagnetic energy.
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| | C) | Both a and b.
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| | D) | Neither a nor b.
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2 | |
Assuming that light could curve around the Earth, about how long would it take for one trip?
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| | A) | 1/7th second.
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| | B) | 1 second.
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| | C) | 7 seconds.
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| | D) | 7 minutes.
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3 | |
What is the approximate wavelength of red light?
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| | A) | 5 m.
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| | B) | 7 cm
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| | C) | 400 nm.
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| | D) | 700 nm
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4 | |
List these electromagnetic radiations from short to long wavelengths.
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| | A) | Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Radio waves
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| | B) | Radio waves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays
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| | C) | Gamma rays, X-rays, Infrared, Visible light, Ultraviolet, Radio waves
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| | D) | Radio waves, Ultraviolet, Visible light, Infrared, X-rays, Gamma rays
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5 | |
List these electromagnetic radiations from lowest to highest energy. |
| | A) | Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Radio waves |
| | B) | Radio waves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays |
| | C) | Gamma rays, X-rays, Infrared, Visible light, Ultraviolet, Radio waves |
| | D) | Radio waves, Ultraviolet, Visible light, Infrared, X-rays, Gamma rays |
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6 | |
According to Wien's law, a hotter object will __ a cooler object.
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| | A) | appear darker than
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| | B) | radiate the same intensity of wavelengths as
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| | C) | radiate more strongly at shorter wavelengths than
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| | D) | appear the same color as
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7 | |
What is the difference between emission and absorption in an atom?
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| | A) | In emission, the nucleus goes from a lower to a higher orbit.
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| | B) | In emission, the electron goes from a higher to a lower orbit.
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| | C) | In absorption, the electron goes from a higher to a lower orbit.
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| | D) | Both b and c.
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8 | |
What is the relationship between wavelength (8) and frequency (<)?
("c" is the speed of light)
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| | A) | 8<=c
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| | B) | 8/<=c
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| | C) | </8=c
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| | D) | 8c=<
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9 | |
Which of these are effects of the Doppler shift?
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| | A) | When an object is moving toward us, the wavelengths of its light decrease.
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| | B) | When an object is moving away from us, the wavelengths of its light get longer.
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| | C) | When an object accelerates, the wavelengths of its light get warmer
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| | D) | Both a and b are correct.
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10 | |
Of these gases in the Earth's atmosphere, which absorb infrared radiation?
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| | A) | Water vapor.
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| | B) | Nitrogen.
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| | C) | ozone.
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| | D) | Both a and c
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11 | |
Which gas(es) in the Earth's atmosphere absorb ultraviolet radiation?
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| | A) | Ozone and oxygen
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| | B) | Nitrogen and argon.
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| | C) | Water vapor and carbon dioxide
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| | D) | None of the above.
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12 | |
What type of spectrum is emitted by a heated solid object (such as the filament of an incandescent bulb)?
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| | A) | Continuous.
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| | B) | Emission line.
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| | C) | Absorption line.
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| | D) | None of the above.
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13 | |
What type of spectrum is emitted when the light from a hot, dense body passes through a cooler, tenuous gas?
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| | A) | Continuous.
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| | B) | Emission line.
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| | C) | Absorption line.
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| | D) | None of the above.
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14 | |
What type of spectrum is emitted by a hot, tenuous gas?
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| | A) | Continuous.
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| | B) | Emission line.
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| | C) | Absorption line.
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| | D) | None of the above.
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15 | |
What are some of the things astronomers can learn about astronomical objects from their spectra?
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| | A) | Chemical composition.
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| | B) | Whether a gas or solid or combination, due to the type of spectrum.
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| | C) | How fast the objects are moving.
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| | D) | All of the above
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2002 McGraw-Hill Higher Education