Bookmark.icon

Candela

The luminous power per unit solid angle emitted by a point light source in a particular direction.
candela

The candela is the base unit of luminous intensity in the International System of Units (SI); that is, luminous power per unit solid angle emitted by a point light source in a particular direction. Luminous intensity is analogous to radiant intensity, but instead of simply adding up the contributions of every wavelength of light in the source's spectrum, the contribution of each wavelength is weighted by the standard luminosity function (a model of the sensitivity of the human eye to different wavelengths). A common wax candle emits light with a luminous intensity of roughly one candela. If emission in some directions is blocked by an opaque barrier, the emission would still be approximately one candela in the directions that are not obscured.

The word candela is Latin for candle. The old name "candle" is still sometimes used, as in foot-candle and the modern definition of candlepower.

Key Terms

base unit luminous intensity
candela
directions
emission
international system units
luminous intensity
luminous power per unit solid angle
particular direction
point light source
si

Additional Resources

No ressources found.

Acronymn

CD

Synonymns

Candela
(none found)

Comments

No comment found.

Sources & Credits

Last modified on July 3 2019
Content adapted from Wikipedia
No credits found.
Copyright 2019 Videocide.com  |  All Rights Reserved
linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram