Photoelectric Effect

[Jonathan Marcial Dis 1K]

When a photon hits a metal surface, an electron is only occasionally emitted. I forget, does the energy of the photon have to be greater than or equal to the energy of the electron in order for the electron to be emitted? Thanks.

[Chem_Mod]

energy of the photon has to be greater than or equal to the work function/threshold energy

[Jared Pagal 1J]

Yes, in order for a photon to be emitted, the energy of the incoming photon must be equal to or greater than the threshold energy (the minimum energy it takes to eject one electron). Any "excess" energy is considered the kinetic energy of the ejected electron.

[Shione Nakahara 1F]

Yes, the energy of the photon has to overcome the threshhold energy, and any energy of the photon that is left over is converted to kinetic energy of the electron.

[SamanthaGrohe1B]

the energy has to be greater than or equal to the threshold energy or an electron will not be emitted. by having the energy of the photon be greater or equal to the energy of the electron this excess or equivalency of energy is converted to kinetic energy that is exhibited in the emitting of the electron from the metal

[Ziana Bhanji 1E]

Yes, I agree. It has to be greater than or equal to the threshold energy

[Marina Souliman 1K]

The energy of the photon has to be greater or equal to the threshold energy. In the experiment, they shined UV light on metal to get an idea if its enough energy to remove an electron from the sheet. Which led us to the equation Energy (Kinetic)+ Energy (energy to remove electron)= Energy of the photon.

[Cameron Smith 1I]

Does the level of conductivity of the metal influence the photoelectric effect in any way?

[Chem_Mod]

No. Conductivity is a material property and does not affect the work function of the metal.

[Bijal Luhar]

In order for the photon to be emitted, there must be enough energy to either exceed or equal the threshold necessary.

[Alondra Juarez section 1E]

The energy of the photon has to be either equal or greater than the energy of the electron for it to be emitted.

[Maria Zamarripa 1L]

It has to be at least the amount of energy of the threshold if not more.

[Elana Weingord 1C]

What was the original purpose of the photoelectric effect? (module Q20)