Ultraviolet radiation of frequency 2.4×1015 Hz2.4 \times 10^{15}\text{ Hz}2.4×1015 Hz is incident on a clean magnesium surface inside a vacuum cell. The work function of magnesium is 5.9×10−19 J5.9 \times 10^{-19}\text{ J}5.9×10−19 J.
Which statement is correct?
(Planck's constant h=6.63×10−34 J sh = 6.63 \times 10^{-34}\text{ J s}h=6.63×10−34 J s)
No photoelectrons are emitted from the surface.
Photoelectrons are emitted with a maximum kinetic energy of 5.9×10−19 J5.9 \times 10^{-19}\text{ J}5.9×10−19 J.
Photoelectrons are emitted with a maximum kinetic energy of 1.0×10−18 J1.0 \times 10^{-18}\text{ J}1.0×10−18 J.
Photoelectrons are emitted with a maximum kinetic energy of 1.6×10−18 J1.6 \times 10^{-18}\text{ J}1.6×10−18 J.
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.