CAIE A-Level Physics 22.2.5 Intensity and Photoelectron Energy
Practise comparing how radiation intensity and frequency affect photoelectric current, maximum electron kinetic energy and emission.
- Syllabus
- 2028–2030
- Course
- Physics 9702
- Level
- A2
Exam points
- explain why maximum photoelectron kinetic energy is independent of intensity
- explain why photoelectric current is proportional to intensity
- compare effects of changing frequency and intensity on emission
22.2.5—Why the maximum kinetic energy of photoelectrons is independent of question 1
[Maximum number: 1]
The intensity of the electromagnetic radiation for one particular frequency in (b) is increased.
State and explain the change, if any, in:
the rate of emission of photoelectrons.
more photons (per unit time) so (rate of emission) increases
B1
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