When a quantum of radiation, or a PHOTON, (q.v.), in the X-ray portion of the electromagnetic spectrum strikes an atom, it may impinge on an electron within an inner shell and eject it from the atom. If the photon carries more energy than is necessWhen a quantum of radiation, or a PHOTON, (q.v.), in the X-ray portion of the electromagnetic spectrum strikes an atom, it may impinge on an electron within an inner shell and eject it from the atom. If the photon carries more energy than is necessary to eject the electron, it will transfer its residual energy to the ejected electron in the form of kinetic energy.
This phenomenon, called the photoelectric effect, occurs primarily in the absorption of low-energy X raysary to eject the electron, it will transfer its residual energy to the ejected electron in the form of kinetic energy.
This phenomenon, called the photoelectric effect, occurs primarily in the absorption of low-energy X rays
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