AST A105 homework3

AST A105 homework3 - 1. What kind of spectrum does a hot...

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1. What kind of spectrum does a hot solid produce? A) Emission (bright lines) B) Absorption (dark lines) C) Continuous (all the colors of the rainbow) D) Infrared E) Ultraviolet 2. Since each element has a different number of protons and electrons and a different pattern of electron orbits, A) Gasses made of different elements have different patterns of emission and absorption lines B) Each element's spectrum is unique C) We can tell what a gas is made of from its spectrum, even if it is billions of miles away D) All of the above E) A and B 3. How does the speed (in a vacuum) of a high-frequency electromagnetic wave compare with a low-frequency electromagnetic wave? A) the lower-frequency wave has the higher speed because speed is inversely related to frequency B) the two waves have the same speed because the speed of light is constant C) the lower-frequency wave has the higher speed because it has the longest wavelength D) the higher-frequency wave has the higher speed 4. If an object moves along a curved path at constant
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speed, then a) a force is acting upon it. b) it is accelerating. c) it is in uniform motion. d) both (a) and (b) are true. e) neither (a) nor (b) are true. 5. Which of the following sequence of electromagnetic radiations is in order of increasing wavelength? A) radio, infrared, UV, gamma ray B) gamma ray, UV, radio, microwave C) X-ray, visible, infrared, radio D) UV, infrared, visible, microwave 6. Human beings mostly emit which kind of electromagnetic radiation? A) ultraviolet B) visible C) microwave D) infrared 7. What's the difference in what you see when visible light of different energies enters your eyes: A) You see a range of brightness B) You see different colors C) Your eye feels warm or cool D) More energetic light makes you blink E) None of the above
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8. What kind of spectrum does a hot gas produce? A) Emission (bright lines) B) Absorption (dark lines) C) Continuous (all the colors of the rainbow) D) Infrared E) Ultraviolet 9. A bowling ball and a paper bag are placed outside of the airlock of a tourist spaceship. The spaceship is coasting with its engines off, halfway along on a weeklong
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AST A105 homework3 - 1. What kind of spectrum does a hot...

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