(a)[2]
State what the term photon means.
(b)[3]
It has been observed that when photoelectric emission of electrons occurs, there is almost no time delay between shining light on the surface and the emission of an electron. State three other pieces of evidence from the photoelectric effect for the particulate nature of electromagnetic radiation.
(c)[3]
The work function of a metal surface is $3.5\,\text{eV}$. Light with wavelength $450\,\text{nm}$ falls on the surface. Determine whether electrons will be emitted from the surface by the photoelectric effect.