1. A relatively heavy coating of hoarfrost. With respect to vegetation, a white frost is less damaging than a black frost for at least two reasons: 1) it tends to insulate the plant from further cold;
and 2) it releases latent heat of fusion (albeit slight) to the environment. 2. Colloquial term for a deposit of fine rime.
Ice with a white appearance caused by the occurrence of bubbles within the ice. The bubbles increase the scattering of all wavelengths of light in contrast to the appearance of bubble-free blue ice.
The sum of all visible wavelengths of light (400-700 nm) so that all colors are blended to appear white to the eye. No pronounced contribution from any one spectral line (or light-emitting element) is
implied.
A major flare in which small parts become visible in white light. This rare continuum emission is caused by energetic particle beams bombarding the lower solar atmosphere. Such flares are usually stro
ng x-ray, radio, and particle emitters.