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Please refer to the link below. This will take you to a web site that discusses this. Multiwavelength astronomy is dedicated to observing the various spectrums of radiation emitted. That is called its light gathering ability. The 'aperture size' determines the amount of light (radiation) a telescope gathers This site might help you obtain a more in depth answer imagine.gsfc.NASA.gov IT IS CALLED "LIGHT GRASP" in an optical telescope and "RF GAIN" in a radio-telescope.

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16y ago

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