PHYS 1010 Lecture Notes - Lecture 22: Johannes Rydberg, Emission Spectrum, Diffraction Grating
29 Nov 2016
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Document Summary
Light emission is understood in terms of the familiar planetary model of the atom. Just as each element is characterized by the number of electrons that occupy the shells surrounding its atomic nucleus, each element also possesses its own characteristic pattern of electron shells, or energy states. These states are found only at certain energies; we say they are discrete. We call these discrete states quantum states. When energy is imparted to an element, an electron may be boosted to a higher. The frequency of an emitted photon ~ energy level difference in de-exciting: energy level. The atom is said to be excited. Red light has less energy per photon. Arrangement of slit, focusing lenses, and prism or diffraction grating. To see emission spectrum of light from glowing element. When an electron is at a higher energy level, atom is excited and temporarily loses the acquired energy when it returns to a lower level and emits radiant energy.
