WJEC A-level Physics 1420QS · 2.8(d)
Population inversion in three- and four-level systems
- Code
- 2.8(d)
- In
- 2.8 Lasers
- Topic
- 2 AS Unit 2: Electricity and Light
- Course
- A-level Physics 1420QS
- Board
- WJEC
Codes and titles are read by a script from WJEC's published specification and have not been checked by a person. What each point covers is in the specification itself: WJEC’s specification.
Points in 2.8 Lasers
- 2.8(a) Stimulated emission
- 2.8(b) Population inversion in lasers
- 2.8(c) Population inversion and two-level systems
- 2.8(d) Population inversion in three- and four-level systems
- 2.8(e) The process of pumping and its purpose
- 2.8(f) Structure of a laser
- 2.8(g) Semiconductor lasers: advantages and uses