Microwave communication uses high-frequency ________blank.Multiple Choiceradio wavesinfraredsatellite communicationsoptic fibers

The correct answer is radio waves.

Explanation:

Microwave communication primarily employs high-frequency radio waves, specifically in the microwave frequency range, which spans approximately from 1 GHz to 300 GHz. These radio waves are characterized by their ability to transmit information over long distances and can penetrate the atmosphere effectively, which makes them suitable for communication in various applications, including satellite communications, telecommunication networks, and radar systems.

Microwave frequencies are useful because they offer a balance between the ability to carry a large amount of data and the physical attributes that allow them to pass through obstacles, such as buildings and trees, without significant loss of signal. Other options listed, such as infrared and optical fibers, do not cater to the same long-range transmission capabilities that microwaves provide, particularly in communication systems.

Therefore, in the context of microwave communication, the most appropriate choice is radio waves.