The Photoelectric Effect

1
The Photoelectric Effect

• The photoelectric effect is the emission of
  electrons from a metal or surface by light
  photons.

2
Photon EnergyE h fE Energy Joule
(J)h Plancks constant (J.s)f frequency Hertz
(Hz)
3
Energy conservation

• h f F KEmax
• KEmax h f F
• KE Kinetic Energy Joule (J)
• F Work function Joule (J)

4
Stopping Voltage

• KEmax e Vs
• Vs (h/e) f F/e