What is amplitude,frequency and time period?
Amplitude: When a mechanical wave propagates through a medium, the particles of the medium begin to vibrate or oscillate about its mean position. Amplitude is the maximum displacement of a particle from its mean position.
When you drop a stone on a pond, you can see the water waves. I've shown the amplitude and the mean position of the water molecules on the surface of water.
Frequency: Frequency (ν) is the number of complete oscillations or vibrations in 1 s. It is the inverse of time period (T).
So, the frequency is,
Unit of frequency is s-1 or Hz (Hertz).
Time period is the time taken to complete one oscillation. It is measured in second, s.