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Which one of the following graph represents the variation of maximum kinetic energy (E_k ) of the emitted electrons with frequency v in photoelectric effect correctly?

Correct answer

3

Step-by-step solution

According to photoelectric equation E_k=h v-h v₀ ...(i) If the energy of photon (h v) is less than the work function (h v₀ ) of metallic surface, then electrons will never be ejected from surface regardless of intensity of incident light. Also, from Eq. (i), when v=v₀, E_k=0 Graph (4) represents variation of E_k with v .

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