Question

Which of the following could Einstein's theory on the photoelectric effect explain that the wave theory could not explain?

Electrons were ejected by incoming light.

The kinetic energy of photoelectrons was not related to the intensity of light.

If the light intensity was increased, then the number of electrons ejected increased.

If the light intensity was decreased, then the number of ejected electrons decreased.

Answer 1

which one do you thing??

Answer 2

I think it is The kinetic energy of photoelectrons was not related to the intensity of light.

Answer 3

Am I correct?

Answer 4

Yes that's correct, because unlike wave theory light comes in packets known as 'quanta' and the energy is absorbed by a single electron to get excited. Thus, the energy of the emitted electrons does not depend on the intensity of the incoming light, but only on the energy or frequency of the individual photons. Increasing intensity only increases the rate at which electrons are ejected. I hope that it clears your doubt

Answer 5

Thank you so much. I just wanted to confirm that I was right.