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Questions and Answers
Which of the following is the primary function of our eyes?
Which of the following is the primary function of our eyes?
- To detect light (correct)
- To measure light after it has been brought into focus
- To record celestial objects
- To take photographs
What is a detector?
What is a detector?
- A way to measure the sensitivity of our eyes
- A tool for recording celestial objects
- Something that measures light after it has been brought into focus (correct)
- A device used for taking photographs
How can a telescope be used like a camera?
How can a telescope be used like a camera?
- By attaching a camera lens to the telescope
- By using CCDs to capture images
- By using a telescope to take long exposure photographs
- By removing the eyepiece and using a photographic plate or film in the focal plane (correct)
Why do astronomers sometimes use long exposure times when taking photographs with telescopes?
Why do astronomers sometimes use long exposure times when taking photographs with telescopes?
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What are CCDs used for in astronomy?
What are CCDs used for in astronomy?
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Which of the following best describes a CCD?
Which of the following best describes a CCD?
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Photometry is different from photography because it
Photometry is different from photography because it
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What is the purpose of a spectrograph in spectroscopy?
What is the purpose of a spectrograph in spectroscopy?
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What are emission and absorption lines in spectroscopy?
What are emission and absorption lines in spectroscopy?
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Why is a slit used in spectroscopy?
Why is a slit used in spectroscopy?
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