In photoelectric effect, electrons will leave the metal surface when illuminated by light of appropriate frequency if the photon energy is

In the photoelectric effect, when light shines on a metal surface, electrons can be emitted from the surface of the metal. The energy of the photons in the light is transferred to the electrons, which can overcome the binding energy of the metal and escape from its surface. The minimum amount of energy required to remove an electron from the metal surface is called the work function. If the energy of the photons is less than the work function, the electrons cannot overcome the binding energy and will not be emitted from the surface. On the other hand, if the energy of the photons is greater than or equal to the work function, the electrons can be emitted. Therefore, to answer the question, if the photon energy is greater than the work function, the electrons will leave the metal surface when illuminated by light of appropriate frequency in the photoelectric effect. Answer "greater than the work function," is the correct answer.