Laser physics: out-of-syllabus check
Optional questions on stimulated emission, population inversion, laser operation and beam properties, beyond the H2 syllabus.
Learning goals
- Explain excitation, spontaneous emission and stimulated emission.
- Explain metastable states, pumping, population inversion, threshold, optical feedback, output coupling and cavity modes.
- Relate laser operation to coherence, linewidth, divergence, irradiance, photon quantities and a helium-neon example.
Use the feedback to improve your answers; this practice does not count towards your progress.
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Paper instructions
Practise
Practise questions on the skills you are learning. This is for practice only and doesn’t count towards your course progress.
- Question count is checked before you start.
- About 10 minutes.
- Feedback appears after you check each answer.
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Beyond the syllabus: optional enrichment that does not count towards your progress.