Significance of threshold wavelength in photoelectric
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photoelectric threshold. the minimum frequency or maximum wavelength of incident radiation necessary to release photons from a given surface.
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Under the right circumstances light can be used to push electrons, freeing them from the surface of a solid. This process is called the photoelectric effect (or photoelectric emission or photoemission), a material that can exhibit this phenomena is said to be photoemissive, and the ejected electrons are called photoelectrons; but there is nothing that would distinguish them from other electrons. All electrons are identical to one another in mass, charge, spin, and magnetic moment.
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