Photocell cutoff frequency

How does cut-off frequency affect a photoelectron?

Cut-off frequency depends only on the work function of the metal and is in direct proportion to it. When the work function is large (when electrons are bound fast to the metal surface), the energy of the threshold photon must be large to produce a photoelectron, and then the corresponding threshold frequency is large.

What is a cutoff frequency?

The cutoff frequency is the minimum frequency that is required for the emission of electrons from a metallic surface, due to incident radiation. Below the cutoff frequency, the phenomenon of the photoelectric effect stops altogether.

What is the cutoff wavelength for the emission of photoelectrons?

The cutoff wavelength for the emission of photoelectrons from a particular surface is 500 nm. Find the maximum kinetic energy of the ejected photoelectrons when the surface is illuminated with light of wavelength 600 nm. Find the wavelength of radiation that can eject 2.00-eV electrons from calcium electrode.

What frequency should a photoelectric effect occur?

Frequency According to classical electromagnetism, as long as the intensity of the light is great enough, the photoelectric effect should occur at any frequency, a direct contradiction of the experimental evidence, which shows a clear cutoff frequency below which no electrons are ejected.

What happens when a photon is under the cutoff frequency?

If a photon has an energy lower than the cutoff frequency, it cannot kick an electron out and is simply scattered. The events 'during the collision' are not easily answered in this context.

What are the key experimental facts about the photoelectric effect?

Incident light Metal Photoelectrons The key experimental facts about the photoelectric effect are the following. (1) The emission of photoelectrons will not occur at all. if the frequency of the incident electromagnetic radiation is less than a certain frequency called the cutoff frequency.