Einstein's photoelectric equation is Ex =hf. In this equation, Ex refers to
Correct answer: C. maximum kinetic energy of emitted electrons
- A. kinetic energy of all the emitted electrons
- B. mean kinetic energy of emitted electrons
- C. maximum kinetic energy of emitted electrons
- D. minimum kinetic energy of emitted electrons
Explanation
In Einstein's photoelectric equation, Ex =hf, Ex represents the maximum kinetic energy of emitted electrons. This is the energy associated with the fastest electrons ejected from the metal surface in the photoelectric effect.Incorrect Options and Explanations: (a) kinetic energy of all the emitted electrons - The equation gives the maximum kinetic energy of one electron, not the sum for all emitted electrons. (b) mean kinetic energy of emitted electrons - The equation provides the maximum kinetic energy, not the mean kinetic energy. (d) minimum kinetic energy of emitted electrons - The equation provides the maximum kinetic energy, not the minimum kinetic energy.
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