Black

related topics
{math, energy, light}
{@card@, make, design}
{black, white, people}
{acid, form, water}
{album, band, music}
{law, state, case}

Black is the color of objects that do not emit or reflect light in any part of the visible spectrum; they absorb all such frequencies of light. Although black is sometimes described as an "achromatic", or hueless, color, in practice it can be considered a color, as in expressions like "black cat" or "black paint".

Contents

Etymology

The word black comes from Old English blæc ("black, dark", also, "ink"), from Proto-Germanic *blakkaz ("burned"), from Proto-Indo-European *bhleg- ("to burn, gleam, shine, flash"), from base *bhel- ("to shine"), related to Old Saxon blak ("ink"), Old High German blah ("black"), Old Norse blakkr ("dark"), Dutch blaken ("to burn"), and Swedish bläck ("ink"). More distant cognates include Latin flagrare ("to blaze, glow, burn"), and Ancient Greek phlegein ("to burn, scorch"). Black supplanted the wonted Old English word sweart ("black, dark"), which survives as swart, swarth, and swarthy (compare German schwarz and Dutch zwart, "black").

Full article ▸

related documents
Abbe number
Crux
Hexagon
Truncated icosahedron
Pentagon
Orbital (The Culture)
Nichols radiometer
Drop (liquid)
Polarization-maintaining optical fiber
Field ion microscope
Gnomon
Andromeda (constellation)
Spica
Triangulum
Archimedean spiral
Guided ray
Prandtl number
Pseudosphere
Thermosphere
Brightness temperature
Édouard Roche
Hour angle
Directive gain
Umbra
Solid-state physics
Microphotonics
Alpha Arietis
Quintessence (physics)
Gauss (unit)
Rayleigh number