They are not always different. If the communication is between two radios directly, only one frequency is used. This is called simplex operation. It works fine because only one radio is transmitting...
Compared to what ?Radio waves have very high frequency compared to ocean waves, El Niño, and the business cycle.Radio waves have high frequency compared to sound and ultrasound waves.Radio waves...
Compared to what ? What do you call "high" . Most radio waves have higher frequencies than most sound waves, and they all have lower frequencies than light waves.We generate and detect radio waves...
Low, medium and high frequencies is ideal for long distance communication but it is very sensitive to QRM and QRN because only amplitude modulation can be used on this part of the RF spectrum, FM...