Search results
Threshold Wavelength (λ th) During the emission of electrons, a metal surface corresponding to the greatest wavelength to incident light is known as threshold wavelength. λ th = c/γ th. For wavelengths above this threshold, there will be no photoelectron emission. For λ = wavelength of the incident photon, then
The threshold wavelength, related to threshold frequency by the wave equation, is defined as: The longest wavelength of incident electromagnetic radiation that would remove a photoelectron from the surface of a metal. Threshold frequency and wavelength are properties of a material, and vary from metal to metal.
When a metal surface is exposed to a monochromatic electromagnetic wave of sufficiently short wavelength (or equivalently, above a threshold frequency), the incident radiation is absorbed and the exposed surface emits electrons. This phenomenon is known as the photoelectric effect.
Sep 12, 2022 · When a metal surface is exposed to a monochromatic electromagnetic wave of sufficiently short wavelength (or equivalently, above a threshold frequency), the incident radiation is absorbed and the exposed surface emits electrons. This phenomenon is known as the photoelectric effect.
The threshold wavelength, related to threshold frequency by the wave equation, is defined as: The longest wavelength of incident electromagnetic radiation that would remove a photoelectron from the surface of a metal
This minimum frequency is also called the threshold frequency, and the value of ν 0 depends on the metal. For frequencies greater than ν 0 , electrons would be ejected from the metal. Furthermore, the kinetic energy of the photoelectrons was proportional to the light frequency.
You can see for yourself that the threshold wavelength is 458 nm (blue light). This means that if calcium metal were used in a light meter, the meter would be insensitive to wavelengths longer than those of blue light.
Jun 30, 2023 · You can show for yourself that the threshold wavelength is 459 nm (blue light). This means that if calcium metal is used in a light meter, the meter will be insensitive to wavelengths longer than those of blue light.
Feb 20, 2022 · There is a threshold frequency below which no electrons are ejected, because the individual photon interacting with an individual electron has insufficient energy to break it away. Above the threshold energy, \(KE_e\), increases linearly with \(f\), consistent with \(KE_e = hf - BE\).
Determine the maximum kinetic energy of photoelectrons ejected by photons of one energy or wavelength, when given the maximum kinetic energy of photoelectrons for a different photon energy or wavelength. When light strikes materials, it can eject electrons from them.
