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steradian

1 substantive

Terminological databases

Lennunduse terminibaas

ID 734183 Last modified 03.05.2024
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Domain units of measurement
steradiaan
sr
steradian
sr
  • ruuminurga mõõtühik: üks steradiaan on võrdne ruuminurgaga, mis toetub raadiuse ruuduga võrdsele kerapinna osale
  • a unit of measure of solid angles that is expressed as the solid angle subtended at the center of the sphere by a portion of the surface whose area is equal to the square of the radius of the sphere
steradiaan
Usage examples
  • ... kandela on kiirgusallikast etteantud suunas kiiratud monokromaatse 540·1012 hertsise kiirgussagedusega ja samas suunas 1/683 vatti steradiaani kohta kiirgustugevust omava kiirguse valgustugevus ...
sr symbol
steradian
sr symbol

Matemaatika terminibaas

ID 666767 Last modified 18.01.2024
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Domain Mathematics

Metroloogia terminibaas

ID 573417 Last modified 01.10.2026
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Domain metrologyunits of measurement
steradiaan
sr
steradian
sr
  • ruuminurga SI tuletatud ühiku nimetus/tähis
  • name/symbol of the SI derived unit for solid angle
  • solid angle of a cone which cuts out on a spherical surface with centre at the apex an area equal to the square of the radius
steradiaan
Usage examples
  • Steradiaan, tähis sr, on ruuminurk, mis toetub kera keskele ja eraldab kera pinnalt pindala, mis võrdub kera raadiuse ruuduga (A = r²).
sr symbol
Usage examples
  • 1 sr = 1 m2/m2 = 1.
steradian
Usage examples
  • The steradian, symbol sr, is a solid angle that subtends the center of a sphere and cuts off an area on the sphere's surface equal to the square of the sphere's radius (A = r²).
sr symbol
Usage examples
  • 1 sr = 1 m2/m2 = 1.

Valgustehnika terminibaas

ID 646482 Last modified 25.11.2025
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Domain electric lighting
  • SI süsteemi ruuminurga ühik
    Good to know
    • Tähis: sr
    • 1 sr on võrdne ruuminurgaga, mille tipp asub kera keskpunktis ja mis lõikab ära kera pinnal ala, mille pindala on võrdne kera raadiuse ruuduga.
  • SI unit of solid angle
    Good to know
    • Symbol: sr
    • 1 sr is equal to the solid angle that, having its vertex at the centre of a sphere, cuts off an area of the surface of the sphere equal to the square of the radius of the sphere.
steradiaan
Usage examples
  • Kogu sfäärile vastav ruuminurk on 4π ≈ 12,57 steradiaani.
steradian

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