Question

What type of waves in the electromagnetic spectrum has the Search for Extraterrestrial Intelligence (SETI) mostly analyzed in the search for intelligent life?
A. radio
B. visible
C. infrared
D. ultraviolet

Answer 1

I would say A because the SETI Institute said, "Philip Morrison and Guiseppe Cocconi analyzed how two civilizations separated by many light years of space might use electromagnetic radiation to communicate.

Electromagnetic radiation is the general term for the more familiar light and radio waves."

So there you go!