Why Are Radio Waves Probably the Most Efficient Way to Communicate

question 28

Multiple Choice

Why are radio waves probably the most efficient way to communicate between civilizations?

• A) radio waves are easy to produce and are not affected much by interstellar matter in the galaxy
• B) radio waves are the most penetrating of all electromagnetic radiations
• C) all advanced civilizations are certain to use radio waves for communication
• D) radio waves are the only kind of electromagnetic radiation that can carry information

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Definitions:

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