PHOTOELECTRIC EFFECT - PowerPoint PPT Presentation

1 / 7
About This Presentation
Title:

PHOTOELECTRIC EFFECT

Description:

Wave-Particle Duality. Before 1900, light was understood as an electromagnetic wave ... A particle of light is a photon. Energy of electron Ekin = h f W ... – PowerPoint PPT presentation

Number of Views:1032
Avg rating:3.0/5.0
Slides: 8
Provided by: Iva4
Category:

less

Transcript and Presenter's Notes

Title: PHOTOELECTRIC EFFECT


1
PHOTOELECTRIC EFFECT
2
Classical physics pre1900
  • Particles and Waves
  • Newtons Laws of force
  • Wave nature of light (Maxwell)

3
Modern Physics post 1900
  • Quantum physics (Planck, Einstein, Schrodinger,
    Heisenberg, Pauli, Dirac, )
  • Relativity (Einstein, Lorentz, Minkowski, Mach,
    )

4
Whats photoelectric effect?
  • UV light is shone on a metal, and electrons are
    released - photoelectrons

5
Wave-Particle Duality
  • Before 1900, light was understood as an
    electromagnetic wave
  • In 1905, Einstein proposed that light could also
    exist in the form of particles
  • A particle of light is a photon

6
Energy of electron Ekin   h f W
  • Ekin - maximal kinetic energy of an emitted
    electron
  • h - Planck constant (6.626 x 10-34 Js)
  • f - Frequency
  • W - work function

7
(No Transcript)
Write a Comment
User Comments (0)
About PowerShow.com