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1 | |
What is light? |
| | A) | Light is radiant energy in the form of a stream of energy particles, called photons. |
| | B) | Light is radiant energy in the form of a wave of electromagnetic energy. |
| | C) | Both a and b. |
| | 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? |
| | A) | 1/7th second. |
| | B) | 1 second. |
| | C) | 7 seconds. |
| | D) | 7 minutes. |
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3 | |
What is the approximate wavelength of red light? |
| | A) | 5 m. |
| | B) | 7 cm |
| | C) | 400 nm. |
| | D) | 700 nm |
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4 | |
List these electromagnetic radiations from short to long wavelengths. |
| | 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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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. |
| | A) | appear darker than |
| | B) | radiate the same intensity of wavelengths as |
| | C) | radiate more strongly at shorter wavelengths than |
| | D) | appear the same color as |
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7 | |
What is the difference between emission and absorption in an atom? |
| | A) | In emission, the nucleus goes from a lower to a higher orbit. |
| | B) | In emission, the electron goes from a higher to a lower orbit. |
| | C) | In absorption, the electron goes from a higher to a lower orbit. |
| | 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) |
| | A) | 8<=c |
| | B) | 8/<=c |
| | C) | </8=c |
| | D) | 8c=< |
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9 | |
Which of these are effects of the Doppler shift? |
| | A) | When an object is moving toward us, the wavelengths of its light decrease. |
| | B) | When an object is moving away from us, the wavelengths of its light get longer. |
| | C) | When an object accelerates, the wavelengths of its light get warmer |
| | D) | Both a and b are correct. |
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10 | |
Of these gases in the Earth's atmosphere, which absorb infrared radiation? |
| | A) | Water vapor. |
| | B) | Nitrogen. |
| | C) | ozone. |
| | D) | Both a and c |
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11 | |
Which gas(es) in the Earth's atmosphere absorb ultraviolet radiation? |
| | A) | Ozone and oxygen |
| | B) | Nitrogen and argon. |
| | C) | Water vapor and carbon dioxide |
| | 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)? |
| | A) | Continuous. |
| | B) | Emission line. |
| | C) | Absorption line. |
| | 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? |
| | A) | Continuous. |
| | B) | Emission line. |
| | C) | Absorption line. |
| | D) | None of the above. |
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14 | |
What type of spectrum is emitted by a hot, tenuous gas? |
| | A) | Continuous. |
| | B) | Emission line. |
| | C) | Absorption line. |
| | 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? |
| | A) | Chemical composition. |
| | B) | Whether a gas or solid or combination, due to the type of spectrum. |
| | C) | How fast the objects are moving. |
| | D) | All of the above |
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2002 McGraw-Hill Higher Education