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Astronomy Chp 4

QuestionAnswer
What quality is most crucial in terms of quality of a telescope? diamter of mirror/lens
large reflector telescopes have the following significant advantages over large refractors both: mirrors are less expensive than lenses and mirrors weight less
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
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
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.
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.
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.
Which of the following is the most commonly used detector system in modern astronomy? CCD s
Which of the following telescopes is most suitable for observing cool gas clouds? Radio telescope
______ is the most important quality of an astronomical telescope Resolving power
The major advantage of space-based telescopes is _______. they are not affected by atmospheric scintillation
Which design parameter affects the light gathering power of a telescope? Diameter
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
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
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
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
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
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
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
Which device creates a false color image? Computer
Which device accumulates light? photographic film
Which device accumulates light? computer
Which device improves “seeing”? adaptive optics
Which device points a telescopes in a desired direction? computer
Which device reads data from a CCD detector? computer
Which device processes signals from interferometers? computer
Which device weighs less than lenses of the same size? mirrors
Which device is affected by dispersion refractor
The largest telescope of this kind is 1 m in diameter? refractor
Which device is used in optical telescopes with segmented design? mirrors
Which device has inherently low resolution? radio telescopes
Which device cannot be used for Earth-based observation? x-ray telescopes
Which device’s optical telescope not affected by “seeing”? Hubble Space telescope
Created by: edeboo
 

 



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