Assertion: Work function of aluminium is 4.2 eV. Emission of electrons will not be possible if two photons, each of energy 2.5 eV, strike an electron of aluminium. Reason: For photoelectric emission, the energy of each photon should be greater than the work function of aluminium.

Question

Assertion: Work function of aluminium is 4.2 eV. Emission of electrons will not be possible if two photons, each of energy 2.5 eV, strike an electron of aluminium. Reason: For photoelectric emission, the energy of each photon should be greater than the work function of aluminium. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Correct answer is (a) If both assertion and reason are true and reason is the correct explanation of assertion

Q. Assertion : Work function of aluminium is 4.2 eV. Emission of electrons will not be possible if two photons, each of energy 2.5 eV, strike an electron of aluminium. Reason : For photoelectric emission, the energy of each photon should be greater than the work function of aluminium.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Correct answer is (a) If both assertion and reason are true and reason is the correct explanation of assertion

Q. Assertion : Work function of aluminium is 4.2 eV. Emission of electrons will not be possible if two photons, each of energy 2.5 eV, strike an electron of aluminium.
Reason : For photoelectric emission, the energy of each photon should be greater than the work function of aluminium.