Photoelectric effect: stopping potential and Einstein's equation
Light falls on a metal plate in an evacuated tube. Change wavelength, intensity, metal and collector voltage; record stopping potentials and measure Planck's constant from the V₀–ν line.
About this experiment
| Subject | Physics |
|---|---|
| Class | 12 |
| Chapter | 11. Dual Nature of Radiation and Matter |
| NCERT section | 11.4–11.6 |
| Level | NEET level |
| Time | about 15 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: photoelectric · work function · stopping potential · Planck constant · Einstein
More from this chapter
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- Thomson's experiment: specific charge e/m of the electron
- Heisenberg uncertainty principle with single-slit electron diffraction
- X-rays: continuous spectrum, characteristic lines, Moseley and Bragg