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steradian (Steradian)

SI solid angle measure. Symbol: sr. It is the solid angle of a sphere subtended by a portion of the surface whose area is equal to the square of the sphere's radius. Another definition is: the solid angle which, having its vertex in the center of the sphere, cuts off an area of the surface of the sphere equal to that of a square with sides of length equal to the radius of the sphere. Steradian = m^2/m^2 = 1.

Ontologie

SUMO / UNITS-OF-MEASURE

Class(es)

is instance of

steradian

Nadtřída(y)

[tree]

is subclass of

is subclass of

veličina

is subclass of

fyzikální veličina

is subclass of

konstantní veličina

is subclass of

is subclass of

jednotka prostorového úhlu

is subclass of

steradian

Související termín(y)

ampere becquerel candela celsius degree coulomb farad gram gray henry hertz joule kelvin degree lumen lux meter mole newton ohm pascal radian second duration siemens sievert tesla volt watt weber

Related WordNet synsets

steradian, sr: the unit of solid angle adopted under the System International d'Unites