veiling luminance

veiling luminance
veiling luminance,
the dissipation of light by water: »

When one is driving in a fog at night, the headlights seem unable to penetrate the fog because so much of their light is scattered back to the eye by tiny droplets of water. The same phenomenon, known as veiling luminance, makes it difficult to use artificial light to see under water (Scientific American).

Useful english dictionary. 2012.

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