The frequency of incident radiation and work function of the metal determine the maximum velocity of photoelectrons.

photoelectric effect is aphenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.

The photoelectric effect provides evidence for the particle-like nature of light because the effect can only be explained by treating light as a collection of particles, or photons, that carry energy. It also supports the idea of quantized energy levels in atoms, where only specific photon energies can excite electrons to higher energy...

When the frequency of the incident light is less than 5.6 x 10 Hz, no photoelectrons are emitted because the energy of the incident photons is less than the work function of sodium, and hence the electrons do not have enough energy to overcome the work function and be emitted.

(i) We can calculate the work function of sodium using the equation:

Energy of incident photon = work function + maximum kinetic energy of photoelectrons

At the threshold frequency, the maximum kinetic energy of...