astro111n_ch5
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Why is a sunflower yellow? | It reflects yellow light.
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| Blue light has higher frequency than red light. Thus, blue light has: | higher energy and shorter wavelength than red light.
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| If we say that a material is opaque to ultraviolet light, we mean that it _________. | absorbs ultraviolet light
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| Recall that one of the laws of thermal radiation states that a higher-temperature object emits photons with higher average energy (Wien’s law). This law is illustrated by the fact that for a higher temperature object, the graph peaks at __________. | a shorter wavelength, Wien’s law states that the thermal radiation from a hotter object peaks at a shorter wavelength.
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| The neon “OPEN” sign appears reddish-orange because __________. | neon atoms emit many more yellow and red photons than blue and violet photons
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| Suppose instead that we are looking at the gas cloud but the light source is off to the side instead of directly behind it. In that case, the spectrum would __________. | be an emission spectrum
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| What type of visible light spectrum does the Sun produce? | an absorption line spectrum
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| Which of the following forms of light can be observed with telescopes at sea level? | radio waves, visible light
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| If our eyes were sensitive only to X rays, the world would appear __________. | dark because X-ray light does not reach Earth’s surface
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| If you had only one telescope and wanted to take both visible-light and ultraviolet pictures of stars, where should you locate your telescope? | in space
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| The Hubble Space Telescope obtains higher-resolution images than most ground-based telescopes because it is: | above Earth's atmosphere.
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Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
zemca
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