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NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER
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Medium
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Analyzing
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Assertion (A): Work function of aluminium is 4.2 eV. Emission of electron will not be possible if two photons each of energy 2.5 eV strike an electron of a aluminium.
Reason (R): For photoelectron emission the energy of each photon should be greater than the work function of metal.
Reason (R): For photoelectron emission the energy of each photon should be greater than the work function of metal.
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Correct option: A
Both A and R are true and R is the correct explanation of A
Option A (Both A and R are true and R is the correct explanation of A) is correct because the work function must be exceeded by the energy of a single photon for photoelectric emission.
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