Waves carry energy through a medium. The medium might wobble but there is no net movement.
Radio waves are part of the Electromagnetic Spectrum. They are a type of electromagnetic radiation.
Sound waves are pressure variations in air (or any fluid) traveling through the fluid.
This image shows a sine wave.
It has a smooth regular shape.
It is special because this signal contains a single frequency.
Other wave shapes contain multiple frequencies.
One complete wave including one peak and one trough.
The distance between one peak and the next. Any point on the wave could be used but peaks are convenient.
The number of cycles per second measured in Hertz (Hz).
Frequency = 1 / Period
The time for one complete cycle to pass measured in seconds.
Period = 1 / Frequency
The highest point on the wave.
The lowest point on the wave.
The distance the medium has moved from its mean position.
This is the peak (of maximum) displacement. The size of the wave measured from the centre line usually in Volts.
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