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Questions and Answers
What is the primary purpose of a detector as explained in the text?
Why do astronomers use long exposure times when photographing celestial objects with a telescope?
How are photography and telescopes related based on the text?
What distinguishes detectors from the human eye as explained in the text?
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Why is it mentioned that astronomers sometimes use very short exposures?
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In what way can a telescope be used similarly to a camera according to the text?
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What is the main difference between human eyes and detectors discussed in the text?
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What is the main advantage of using a CCD over photography for recording images of celestial objects?
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What is the purpose of the slit in a spectrograph?
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What is the main purpose of spectroscopy in astronomy?
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How are spectral lines in spectroscopy related to chemical elements and molecules?
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What is the main difference between photometry and spectroscopy in astronomy?
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What is the main purpose of a spectrograph in astronomical spectroscopy?
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How does the slit in a spectrograph help to improve the quality of the spectral measurements?
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What is the primary advantage of using a CCD over photographic film for astronomical imaging?
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