Question

What part of electromagnetic spectrum we use in arecibo radio telescope for search for extraterrestrial life?

Answer 1

Answer:

Radio has long wavelengths and low energies, while gamma rays have very short wavelengths and high energies. Most of the universe is invisible to us because we only see the visible light portion of the electromagnetic spectrum. When most people think of telescopes they think of visible light, or optical, telescopes.

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