WJEC A-level Physics A420QS · C3.5(d)
Population inversion in three- and four-level systems
- Code
- C3.5(d)
- In
- C3.5 Lasers
- Topic
- C3 Component 3: Light, Nuclei and Options
- Course
- A-level Physics A420QS
- Board
- WJEC
Grade boundaries·WJEC command words
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 C3.5 Lasers
- C3.5(a) Stimulated emission
- C3.5(b) Population inversion in lasers
- C3.5(c) Population inversion and two-level systems
- C3.5(d) Population inversion in three- and four-level systems
- C3.5(e) The process of pumping and its purpose
- C3.5(f) Structure of a laser
- C3.5(g) Semiconductor lasers: advantages and uses