Final answer:
A radio receiver is the device that receives and translates radio waves. It uses an antenna to resonate with the desired frequency of the incoming electromagnetic waves, amplifies the signal, and then decodes and converts it into audio or video format for output.
Step-by-step explanation:
The device that is used to receive radio waves and translate them is known as a radio receiver. This process begins with incoming electromagnetic waves accelerating electrons within an antenna, creating a standing wave. When the radio or television is switched on, its electrical components amplify the signal generated by the accelerating electrons.
Receiver antennas are designed to resonate at certain frequencies in order to produce EM waves. If a receiver dish is used, it helps to focus the signal onto the antenna more effectively. The receiver, tuned to the same resonant frequency as the carrier wave, can pick up the intended signal and reject other frequencies.
Once the radio receiver gets the signal, it decodes the variations in amplitude of the carrier wave to replicate the original audio or video signal, depending on the type of receiver. This signal is then converted and amplified to drive a speaker, bringing audio content such as music, news, or any other broadcasted audio-format content to the listener.