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

Question

Quizplus · Accepted Answer

Radio waves are relatively easy to produce with technology that advanced civilizations may possess, and they are not greatly affected by interstellar matter, making them efficient for long-distance communication.

Answer: B
 Radio waves have a longer wavelength and lower frequency compared to other electromagnetic radiation, allowing them to penetrate through obstacles such as interstellar dust and gas more easily.

Answer: C and D are not correct. While it is possible that advanced civilizations may use radio waves for communication, it is not certain. Other forms of communication, such as laser or quantum communication, may also be used. Additionally, other forms of electromagnetic radiation, such as light or X-rays, can also carry information.

Why Are Radio Waves Probably the Most Efficient Way to Communicate