Shine a torch into fog and the light is scattered by the fog, creating a halo of light around the beam rather than illuminating the object.
"It's like a headlight scattered by fog: The headlight looks bigger," says Woo.
Nongray radiative heat transfer in the anisotropic scattering fog layer, including direct and diffuse solar irradiations and infrared sky flux, is analyzed using REM2.
(Eyes make a better target, but international conventions ban lasers designed to blind).A further limitation is that laser light can be absorbed or scattered by pollution, fog or smoke.
On clear days with very little fog, the scattering coefficient becomes more dependent on wavelength.
Over warm continental areas, however, the air mass is strongly heated so that, instead of fog and low stratus clouds, widely scattered and locally heavy afternoon thunderstorms occur.
In addition, blue and violet light tends to be scattered in the atmosphere, especially in haze, fog, rain and snow, which in part can cause glare and diminished visual acuity".
