7A10.32 - Photoelectric Effect Stopping Potential
- Description
This demonstration illustrates the wavelength dependency of the stopping potential, and can also be used to show it is independent of the light source intensity.
- Equipment
- Optical rail
- Mercury lamp
- Optical diaphragm
- Lens
- Box of filters
- Photocell
- Multimeter
- How to assemble and operate
- 1. Connect the components as shown
- 2. Turn on the mercury lamp and measure the stopping voltage for a given filter
- 3. Repeat this for different filters and observe a higher stopping voltage for bluer filters
