andy
06f5d95c98
Affected files: .obsidian/plugins/obsidian-git/data.json .obsidian/workspace.json Languages/Spanish.md Languages/Spanish/Verbs.md Politcs/Fascism.md STEM/Images/em-spectrum.png STEM/Images/fermi-vacuum-level.png STEM/Images/photo-electric.png STEM/Light.md STEM/Maths/Tensor.md
17 lines
543 B
Markdown
17 lines
543 B
Markdown
$$E=hf$$
|
||
## Photoelectric Effect
|
||
|
||
- Emission of charged particles when exposed to UV light
|
||
- Electrons
|
||
- Einstein suggested light is quantised
|
||
|
||
1. The maximum KE of ejected electrons is independent of intensity, but dependent on frequency $n$
|
||
2. There is a minimum frequency n0below which there is no emission
|
||
3. No time delay (less than 1 ns) before the onset of emission –but the rate of electrons depends on the intensity.
|
||
|
||
![[photo-electric.png]]
|
||
![[fermi-vacuum-level.png]]
|
||
|
||
![[em-spectrum.png]]
|
||
- Radio spectrum
|
||
- 30Hz – 300 GHz |