Spectrographs use a prism or a grating to spread starlight according to wavelength.
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Q123: An achromatic lens brings all colors to
Q124: Both optical and radio telescopes can suffer
Q125: The amount of energy a photon carries
Q126: Earth's atmosphere is fully transparent only to
Q127: Far-ultraviolet rays have short wavelengths, low energies,
Q129: Telescopes in space do not have the
Q130: All radio telescopes are refracting telescopes.
Q131: One of the advantages of charge-coupled devices
Q132: The sidereal drive on a telescope mounting
Q133: Interferometry is easiest to use with telescopes
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