An achromatic lens brings all colors to the same focus.
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Q118: Light is referred to as _ radiation.
Q119: _ absorbs most of the ultraviolet radiation
Q120: Light travels at speed
c. Complete the following
Q121: The light-gathering power of a telescope increases
Q122: Resolving power refers to the ability of
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,
Q128: Spectrographs use a prism or a grating
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