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________ frequency, is the minimum frequency required to eject an electron when photons hit the metal surface.

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in Chemistry – Class 11 by (148k points)
________  frequency, is the minimum frequency required to eject an electron when photons hit the metal surface.

(a) Required

(b) Activated

(c) Threshold

(d) Limiting

The question was posed to me in final exam.

I need to ask this question from Developments Leading to the Bohr’s Model of Atom in chapter Structure of Atom of Chemistry – Class 11

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The correct choice is (c) Threshold

Explanation: In the photoelectric effect, when photons strike on a metal surface, it emits electrons. Thus for emitting an electron, it requires a minimum amount of energy. This is threshold energy acquired through threshold frequency.

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