1. Laws of photoelectric emission
- For a given frequency of radiation, number of photo electrons emitted is proportional to the intensity of incident radiation.
- The K.E. of photo electrons depends on the frequency of incident light but is independent of the light intensity.
2. When radiation falls on metal, photo electrons are emitted with certain velocity even if accelerating potential is zero.
3. At slopping potential (v0), photo current is zero ie. 1/2 mv2max = ev0
Vmax = \(\sqrt{\frac{2eV_o}{m}}\)