Which of the following is not an advantage of radio? a) no metallic wires are needed. b) radio waves propagate easily through office walls. c) radio devices are inexpensive. d) radio waves do not create electrical interference problems. e) radio devices are easy to install.

d) Radio waves do not create electrical interference problems.

Explanation:

Radio waves are a form of electromagnetic radiation that involves visible light as well. Radio waves are not dangerous, but they are actually incredibly useful for longer distance communication.

However, some substances can obstruct radio waves, or interfere with them.

While driving into a tunnel or underground parking garage, one might lose coverage on a car stereo or mobile phone.