1.The work function of Al is 4.2 eV4.2\,\text{eV}4.2eV. If two photons, each of energy 3.5 eV3.5\,\text{eV}3.5eV, strike an electron of aluminium, then emission of the electrona.Will be possibleb.Depends on smoothness of surfacec.Will not be possibled.None of theseLogin to continueOnly logged in users canattempt or see the solution.
