Luminous Intensity

Luminous intensity

The solid angular luminous flux density in a given direction from a light source. It may be considered as the luminous flux on a small surface normal to the given direction, divided by the solid angle (in steradians) which the surface subtends at the source of light. Since the apex of a solid angle is a point, this concept applies exactly only to a point source. The size of the source, however, is often extremely small when compared with the distance from which it is observed, so in practice the luminous flux coming from such a source may be taken as coming from a point. See Candlepower, Photometry

Luminous intensity

The luminous flux emitted from a point per unit solid angle in a particular direction. The luminous intensity is the official base unit for light.

Luminous Intensity

a fundamental photometric quantity characterizing a source of visible radiation. It is in general different for different directions from the source. The luminous intensity is equal to the ratio of the luminous flux emitted by the source, in an infinitesimal (that is, very small) solid angle containing the given direction, to the solid angle. The unit of luminous intensity in the International System of Units is the candela. The concept of luminous intensity is applicable only at distances from the source that greatly exceed the source’s dimensions.

luminous intensity

[′lü·mə·nəs in′ten·səd·ē] (optics) The luminous flux incident on a small surface which lies in a specified direction from a light source and is normal to this direction, divided by the solid angle (in steradians) which the surface subtends at the source of light. Also known as light intensity.

luminous intensity

The luminous flux per unit solid angle in a specific direction from a point source of light; in practice, an interior source may be considered a point source if the distance exceeds 5 to 10 times the maximum source dimension of the luminaire; in US Customary units, expressed in candlepower; in SI units, expressed in candelas.

单词	luminous intensity
释义	luminous intensity luminous intensity n. The luminous flux per unit solid angle as measured in a given direction relative to the emitting source. luminous intensity n (Units) a measure of the amount of light that a point source radiates in a given direction. It is expressed by the luminous flux leaving the source in that direction per unit of solid angle. Symbol: Iv Translations Lichtstärke Luminous Intensity Luminous intensity The solid angular luminous flux density in a given direction from a light source. It may be considered as the luminous flux on a small surface normal to the given direction, divided by the solid angle (in steradians) which the surface subtends at the source of light. Since the apex of a solid angle is a point, this concept applies exactly only to a point source. The size of the source, however, is often extremely small when compared with the distance from which it is observed, so in practice the luminous flux coming from such a source may be taken as coming from a point. See Candlepower, Photometry Luminous intensity The luminous flux emitted from a point per unit solid angle in a particular direction. The luminous intensity is the official base unit for light. Luminous Intensity a fundamental photometric quantity characterizing a source of visible radiation. It is in general different for different directions from the source. The luminous intensity is equal to the ratio of the luminous flux emitted by the source, in an infinitesimal (that is, very small) solid angle containing the given direction, to the solid angle. The unit of luminous intensity in the International System of Units is the candela. The concept of luminous intensity is applicable only at distances from the source that greatly exceed the source’s dimensions. luminous intensity [′lü·mə·nəs in′ten·səd·ē] (optics) The luminous flux incident on a small surface which lies in a specified direction from a light source and is normal to this direction, divided by the solid angle (in steradians) which the surface subtends at the source of light. Also known as light intensity. luminous intensity The luminous flux per unit solid angle in a specific direction from a point source of light; in practice, an interior source may be considered a point source if the distance exceeds 5 to 10 times the maximum source dimension of the luminaire; in US Customary units, expressed in candlepower; in SI units, expressed in candelas. luminous intensity lu·mi·nous in·ten·si·ty (I), the luminous flux per unit solid angle in a given direction. Synonym(s): candle-power, radiant intensity lu·mi·nous in·ten·si·ty (I) (lū'mi-nŭs in-ten'si-tē) The luminous flux per unit solid angle in a given direction. Synonym(s): radiant intensity. intensity, luminous Quotient of the luminous flux leaving the source, propagated in an element of solid angle containing the given direction, divided by the element of solid angle. Symbol: I. Unit: candela (CIE). ThesaurusSeeIV
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luminous intensity

luminous intensity

luminous intensity

Luminous Intensity

Luminous intensity

Luminous intensity

Luminous Intensity

luminous intensity

luminous intensity

luminous intensity

lu·mi·nous in·ten·si·ty (I),

lu·mi·nous in·ten·si·ty

intensity, luminous