A-Level Physics OCR A H556

4.5.2: The photoelectric effect

#4.5.2a

(i) photoelectric effect, including a simple experiment to demonstrate this effect

Learners should understand that the photoelectric effect provides evidence for particulate nature of electromagnetic radiation.

(ii) demonstration of the photoelectric effect using, e.g. gold-leaf electroscope and zinc plate

#4.5.2b

a one-to-one interaction between a photon and a surface electron

#4.5.2c

Einstein’s photoelectric equation $hf = ϕ + KE_{max}$

#4.5.2d

work function; threshold frequency

#4.5.2e

the idea that the maximum kinetic energy of the photoelectrons is independent of the intensity of the incident radiation

#4.5.2f

the idea that rate of emission of photoelectrons above the threshold frequency is directly proportional to the intensity of the incident radiation.

4.5.1

Photons

4.5.3

Waveparticle duality