The ionosphere reflects which of the following EM waves back to Earth for long-distance communication?
Solution
HF/short-wave (3-30 MHz) reflect off the ionosphere enabling skywave propagation.
About this question
Subject: Physics · Chapter: Electronic Devices · Topic: Communication Systems
This question is part of PrepWiser's free JEE Main question bank. 10 more solved questions on Electronic Devices are available — start with the harder ones if your accuracy is >70%.