What is the name given to an electron which is removed from the surface of a metal in the photoelectric effect?

Photoelectron

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What is meant by the work function in the photoelectric effect?

The work function is the minimum energy required to remove an electron from the surface of a metal.

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What is meant by the term threshold frequency in the photoelectric effect?

The threshold frequency is the minimum frequency of incident light that can cause photoelectric emission.

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State the equation linking photon energy (E), work function (ϕ\phi )and maximum kinetic energy (Ekmax).

E = ϕ + Ekmax​


E = photon energy (J)

φ = work function (J)

Ekmax = maximum kinetic energy of photoelectrons (J)

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How many photoelectrons can be liberated from one photon?

One


There is a strict one-to-one interaction between photons and electrons.

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What effect does increasing the intensity of incident light have on the photoelectrons emitted?

Increasing the intensity of light increases the number of photoelectrons emitted per second.

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What effect does increasing the frequency of incident light have on the photoelectrons emitted?

Increasing the frequency of incident light increases the maximum kinetic energy of the photoelectrons.

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The photoelectric effect provides evidence for the (particle/wave) nature of light.

Particle

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Does the kinetic energy of the emitted photoelectrons depend on light intensity?

No


The maximum kinetic energy is dependent on the energy of the individual photons.

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What is stopping potential in the photoelectric effect?

The stopping potential is the minimum voltage needed to stop the emitted photoelectrons.


The stopping potential can be used to calculate the maximum kinetic energy of the photoelectrons.

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