Test #2 Question #2b

[Helen Mejia 1I]

Hi, can someone explain how does the speed of the ejected electron in part (a) change when the intensity of the light is increased?

[Jerome Mercado 2J]

Since the electron can be already ejected surpassing threshold energy, increasing the intensity of the light increases the amount of ejected electrons and the speed of which electrons are ejected. This is because light intensity is directly proportional to frequency as a mechanical view of light (kinetics).

[505211599]

The speed of an ejected electron is not dependent on the intensity of the photon because, as we know, the photoelectric effect theorized that the light is not thought of as a wave propagating through space but instead thought of as quantized packets of energy. Because of this, the energy is dependent on hv, where v is frequency.

[Helen Mejia 1I]

okay, thank you!

[Sapna Ramappa 1J]

If the electron is ejected, then increasing the intensity of the light will increase the number of ejected photons, but this does not have an effect on the speed of the ejected electron.