Which of the following statements arc true for the photo-electric cffcct? (selec

Question

Which of the following statements arc true for the photo-electric cffcct? (select true or false) The frequency of the photons must be larger than a certain minimum value in order to eject electrons from the metal. The maximum energy of the ejectcd electrons is proportional to the velocity of the photons. The maximum energy of the ejectcd electrons varies linearly with the frequency of the incoming photons. The maximum energy of the ejectcd electrons is proportional to the intensity of the incoming photons.

Explanation / Answer

True False True False Reason: Below threshold frequency there is no photo electric effect and the energy of the photon is utilised in two parts 1) to remove the electrons from the metal surface and to give 2) kinetic energy to the electrons.

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