reflectivity Definition and 1 Threads

The reflectance of the surface of a material is its effectiveness in reflecting radiant energy. It is the fraction of incident electromagnetic power that is reflected at the boundary. Reflectance is a component of the response of the electronic structure of the material to the electromagnetic field of light, and is in general a function of the frequency, or wavelength, of the light, its polarization, and the angle of incidence. The dependence of reflectance on the wavelength is called a reflectance spectrum or spectral reflectance curve.

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  1. hilbert2

    Smart glass as Faraday shielding

    Some companies seem to be selling "smart glass" products that can be electrically tuned at will to be either mirroring or transparent, at least in visible wavelengths. Suppose someone were to Faraday shield a room to prevent van Eck phreaking or whatever kind of eavesdropping from outside...
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