Wb-8 Toothbrush Wave Generator
Published: Tuesday 05 June 2007 - Updated: Wednesday 30 March 2011
To demonstrate standing waves on a string using an electric toothbrush as the vibrating source
- Electric toothbrush
- Retort stands
- UV Light source
Click on pictures to enlarge.
An electric toothbrush may be used as the vibrating source for the Melde experiment. A light string attached to the vibrating head of the toothbrush passes over a pulley and weights are attached to vary the tension. The string has been coated with fluorescent paint and if used with an ultraviolet light source the modes of vibration may be easily demonstrated to a large class.