Astronomy Chp 4
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| What quality is most crucial in terms of quality of a telescope? | diamter of mirror/lens
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| large reflector telescopes have the following significant advantages over large refractors | both: mirrors are less expensive than lenses and mirrors weight less
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| Disadvantages of reflector telescopes: A. not suitable for ultraviolet light b. weigh more c. focus different colors at different apots. d. all of the above e. none of the above | none of the above
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| Telescope X can resolve two stars that are separated by at least 2 seconds of arc. If telescope Y can resolve two stars that are separated by 1 second of arc, then (at the same wavelength) compared to telescope X: | Telescope Y has at least twice the resolving power
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| Which of the following is an inherent disadvantage of radio telescopes: | The long wavelength of radio waves results in lower resolving power, compared to other telescopes of the same size.
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| Which of the following telescopes would not be suitable for ground-based observations: | Only X-ray telescope and ultraviolet telescope above would not be suitable.
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| Which of the following is a most significant advantage of the Hubble Space Telescope (HST) compared to the 4-meter reflectors at the Kitt Peak observatory? | not affected by atmospheric scintillation.
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| Which of the following is the most commonly used detector system in modern astronomy? | CCD s
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| Which of the following telescopes is most suitable for observing cool gas clouds? | Radio telescope
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| ______ is the most important quality of an astronomical telescope | Resolving power
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| The major advantage of space-based telescopes is _______. | they are not affected by atmospheric scintillation
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| Which design parameter affects the light gathering power of a telescope? | Diameter
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| Which design parameter affects the magnification of a telescope? a. lens b. diameter c. atmosphere is opaque d. atmosphere is transparent e. none of the above | none of the above
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| Which design parameter affects the resolving power of a telescope? a. lens b. diameter c. atmosphere is opaque d. atmosphere is transparent e. none of the above | diameter
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| Which design parameter is used in a refractive telescope? a. lens b. diameter c. atmosphere is opaque d. atmosphere is transparent e. none of the above | lens
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| Which design parameter is unsuitable for an Earth-based observation telescope? a. lens b. diameter c. atmosphere is opaque d. atmosphere is transparent e. none of the above | atmosphere is opaque to this wavelength
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| Which design parameter of a telescope suffers from dispersion a. lens b. diameter c. atmosphere is opaque d. atmosphere is transparent e. none of the above | lens
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| Which design parameter affects the weight of the lens of a telescope a. lens b. diameter c. atmosphere is opaque d. atmosphere is transparent e. none of the above | diameter
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| Which design parameter is suitable for Earth-based observation? a. lens b. diameter c. atmosphere is opaque d. atmosphere is transparent e. none of the above | atmosphere is transparent to this wavelength
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| Which device creates a false color image? | Computer
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| Which device accumulates light? | photographic film
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| Which device accumulates light? | computer
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| Which device improves “seeing”? | adaptive optics
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| Which device points a telescopes in a desired direction? | computer
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| Which device reads data from a CCD detector? | computer
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| Which device processes signals from interferometers? | computer
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| Which device weighs less than lenses of the same size? | mirrors
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| Which device is affected by dispersion | refractor
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| The largest telescope of this kind is 1 m in diameter? | refractor
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| Which device is used in optical telescopes with segmented design? | mirrors
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| Which device has inherently low resolution? | radio telescopes
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| Which device cannot be used for Earth-based observation? | x-ray telescopes
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| Which device’s optical telescope not affected by “seeing”? | Hubble Space telescope
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