Measure the frequency, wavelength and speed of waves in a solid
There are many different ways that the speed of waves in a solid can be measured. This is one of the methods.
Aim of the experiment
To measure the frequency, wavelength and speed of waves in a metal rod.
- Using the first finger and thumb on one hand, hold a metal rod at its middle point.
- Hit one end of the rod with a hammer.
- Hold a smartphone with an app which measures frequency near the end of the rod.
- Record the peak frequency from the phone app.
- Measure the length of the metal rod and record the length.
- Calculate the speed of the sound waves in the rod using the frequency and wavelength recorded.
Here is an example of how the results table could look:
|Frequency (Hz) ||Length of rod (m)||Wavelength (m)||Wavespeed (m/s)|
State the frequency, wavelength and speed of waves measured in the solid.
Hazards and control measures
|Dropping rod or hammer||Injury from falling objects||Take care to hold equipment carefully|