1. 4.6 NOTES Atomic Emission Spectra

2. Einstein 2. The photoelectric effect – Albert Einstein 1905
Defintion: evidence of Quantum Theory;
If a light is shined at a piece of metal and the light has enough energy then an e- will be released
it is a single beam of light that must have enough energy (2 beams of ½ strength will not work!);
If not enough energy in the beam of light, no e-; more than enough energy then e- is released and will move

3. each metal requires a specific frequency to release e-,
Planck’s proposal didn’t go well, but couldn’t explain why electrons were released when light was shined on various metals;
wave model says continuous long enough time will still eject electrons  not true;
each metal requires a specific frequency to release e-,
Einstein called specific energies photons (Particle like nature of light)
Einstein called a quantum of light a photon. Einstein’s only Nobel Prize :/

4. The Photoelectric Effect

5. Atomic emission spectra
bright line spectrum  unique to each element, only certain frequencies are emitted, originally thought would be continuous, we know ν corresponds to energy;