EM Radiation and Quantumn Phenomena

EM Radiation and Quantumn Phenomena

1. Wave particle duality

   • Wave theory and particle theory

2. Collison of electrons with atoms

3. Energy levels and Phton emmision

4. The photoelectric effect is the observation that many metals emit electrons when light shines upon them. Electrons emitted in this manner can be called photoelectrons. (Released through the application of light)

   • The Threshold Frequency is the minumum frequency of light required to remove an electron from the surface of a metal. Free electrons on the surface of a metal are emmited when EM radiation above the threshold frequency of the metal is directed towards the surface of the metal. Photoelectricity does not take place if the EM radiation is fo a lower frequency than the threshold frequency.
   • The number of electrons emmited per second is proportional to the intensity of the incident radiation.
   • Photoelectric emissions are instantaneous
     • This contradicted wave theory which suggested that energy would build up over time and then an electron would be released.