Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): To eject one mole of photoelectrons from a metal, the minimum energy required from the incident light is Avogadro's number times the work function, provided by exactly one mole of photons. Reason (R): The photoelectric effect is a one-photon to one-electron interaction phenomenon. In the light of t

Step-by-step solution

Assertion (A) is correct. The work function ( W₀ ) is the minimum energy required to eject a single electron. To eject one mole ( N_A ) of electrons, the minimum energy required is N_A W₀ . Because a single photon cannot eject multiple electrons regardless of its energy, this minimum energy must be delivered by exactly one mole of photons, each having energy W₀ . Reason (R) is correct. The quantum nature of light dictates that photoelectric emission is a one-to-one interaction between a photon and an electron. Reas