Electromagnetic materials enter the negative age
- 1 September 2001
- journal article
- other
- Published by IOP Publishing in Physics World
- Vol. 14 (9) , 47-51
- https://doi.org/10.1088/2058-7058/14/9/32
Abstract
Electrical permittivity and magnetic permeability are concepts that are deeply embedded in electromagnetism. The electrical permittivity of a material determines its response to an applied electric field, while the permeability summarizes how it reacts to an applied magnetic field. Together the permittivity and permeability determine how the material responds to electromagnetic radiation of all wavelengths. Indeed, the speed of light in vacuum can be defined as c = 1/√0μ0, where 0 is the permittivity of free space and μ0 is the permeability.Keywords
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