In the study of the photoelectric effect, Vs V_s\,Vs is the stopping potential when light of frequency f f\,f is incident on a metal surface. If h h\,h is the Planck constant and e e\,e is the elementary charge, what quantity is represented by the expression hf−eVshf - eV_shf−eVs?
The maximum kinetic energy of a photoelectron
The work function of the metal
The threshold frequency of the metal
The energy of an incident photon
31 exam-style questions on AQA A Level Physics Electromagnetic radiation and quantum phenomena, covering The photoelectric effect, Collisions of electrons with atoms, Energy levels and photon emission, and Wave-particle duality. Each one has a worked solution and a mark scheme showing where the marks go.