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Lessons for this topic haven’t been written yet. The objectives below show exactly what the syllabus expects, so you can plan with them in the meantime.
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Understand that electromagnetic radiation falling on a metal surface may cause photoelectrons to be emitted from it.
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Understand and use the terms threshold frequency and threshold wavelength.
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Explain photoelectric emission in terms of the photon energy and the work function energy.
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Recall and use hf = Φ + ½mv_max².
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Explain why the photoelectric current is proportional to intensity, whereas the maximum kinetic energy of the photoelectrons does not depend on intensity.
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