The number of electrons ejected from the metal surface after a light wave of certain minimum frequency strikes on the metal surface is proportional to the
Answers
Answer:
Photoelectric effect is defined as the ejection of electrons from the metal surface as soon as the beam of light of appropriate energy (above a threshold) strikes the surface.
In photoelectric effect, a given metal has characteristic threshold frequency (ν
0
) that is required for ejection of electron. Threshold energy is called the work function (hν
0
) of the metal and the excess of energy gets converted to the kinetic energy of the photoelectron.
Answer:
D
Both Assertion and Reason are incorrect
Photoelectric effect is defined as the ejection of electrons from the metal surface as soon as the beam of light of appropriate energy (above a threshold) strikes the surface.
In photoelectric effect, a given metal has characteristic threshold frequency (ν0) that is required for ejection of electron. Threshold energy is called the work function (hν0) of the metal and the excess of energy gets converted to the kinetic energy of the photoelectron.
Since each photon can eject one electron from the surface, the number of electrons ejected will therefore depend upon the number of photons strike per unit area or the intensity of light and not on the energy/frequency of light. As excess of energy will change the kinetic energy of ejected photon and not their number.
Both Assertion and Reason are incorrect