CHEM 1101 Lecture Notes - Lecture 4: Work Function, Photon, Navigational Aid
19 Jan 2017
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Document Summary
When a beam of photons of sufficient energy strikes a collection of atoms of any element, electrons are emitted form the atom. From a chemical point of view: take a gas-phase sample of an element, sine emr of relatively low energy into it. The photoelectric effect involves the collision of one photon with one electron. If you want to remove multiple electrons you will need multiple photons that successfully hit the electrons. Photoelectric effect work function: when a beam of photons of sufficient energy strikes a collection of toms of any element, electrons are emitted from the atoms. If a beam of photons strike a solid surface. Work function: the minimum energy required to remove an electron form a solid surface. If you deliver this using photons, then of the incident photons have more energy than the work function of the material, the excess energy will be converted into kinetic energy of the ejected electrons.
