Radio telescopes are generally much larger in size than are optical telescopes.

Name: Radio telescopes are generally much larger in size than are optical telescopes.
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Radio waves have much longer wavelengths than visible light, so radio telescopes need to be significantly larger in order to capture and focus these waves. This is why many radio telescopes, such as the Arecibo Observatory in Puerto Rico, have dish antennas that are hundreds of feet in diameter.

Radio Telescopes Are Generally Much Larger in Size Than Are