- Optical medium
An optical medium is material through which electromagnetic waves propagate. It is a form of transmission medium. The permittivity and permeability of the medium define how electromagnetic waves propagate in it. The medium has an intrinsic impedance, given by
For example, in free space the intrinsic impedance is called the characteristic impedance of vacuum, denoted Z0, and
- where ε0 is the electric constant and is the magnetic constant.
Notes and references
- ^ With ISO 31-5, NIST and the BIPM have adopted the notation c0.
- ^ Raymond Serway & Jewett J (2003). Physics for scientists and engineers (6th Edition ed.). Belmont CA: Thomson-Brooks/Cole. ISBN 0-534-40842-7. http://worldcat.org/isbn/0-534-40842-7.
- ^ John D Joannopouluos, Johnson SG, Winn JN & Meade RD (2008). Photonic crystals : molding the flow of light (2nd Edition ed.). Princeton NJ: Princeton University Press. ISBN 978-0-691-12456-8. http://ab-initio.mit.edu/book/.
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