Spat (angular unit): Difference between revisions
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The '''spat''' (symbol '''sp'''<ref name="eFunda-2">{{cite book | title=The Ultimate Online Reference for Engineers | publisher=eFunda Inc. | location=Sunnyvale, California, USA | url=http://www.efunda.com/units/show_units.cfm?search_string=spat | accessdate=2015-10-19}}</ref>), from the [[Latin]] ''spatium'' ("space"), is a [[Unit (measurement)|unit]] of [[solid angle]].<ref name="Russ">{{cite web | title=A Dictionary of Units of Measurement | first=Russ | last=Rowlett | date= |
The '''spat''' (symbol '''sp'''<ref name="eFunda-2">{{cite book | title=The Ultimate Online Reference for Engineers | publisher=eFunda Inc. | location=Sunnyvale, California, USA | url=http://www.efunda.com/units/show_units.cfm?search_string=spat | accessdate=2015-10-19}}</ref>), from the [[Latin]] ''spatium'' ("space"), is a [[Unit (measurement)|unit]] of [[solid angle]].<ref name="Russ">{{cite web | title=A Dictionary of Units of Measurement | first=Russ | last=Rowlett | date=2018 | publisher=University of North Carolina | location=Chapel Hill | url=https://www.ibiblio.org/units/dictS.html#spat | accessdate=2024-07-10}}</ref><ref name="eFunda-1">{{cite book | title=Glossary » Units » Solid Angle » Spat | publisher=eFunda Inc. | location=Sunnyvale, California, USA | url=http://www.efunda.com/glossary/units/units--solid_angle--spat.cfm}}</ref> 1 spat is equal to 4{{pi}} [[steradian]]s<ref name="eFunda-2"/><ref name="eFunda-1"/> or approximately {{val|41253}} [[square degree]]s of solid angle {{OEIS|A125560}}.<ref name="Russ"/> Thus it is the solid angle [[Subtended angle|subtended]] by a complete [[sphere]] at its center.<ref name="Russ"/> |
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==See also== |
==See also== |
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Revision as of 11:15, 10 July 2024
 | This article may be too technical for most readers to understand. (March 2023) |
The spat (symbol sp[1]), from the Latin spatium ("space"), is a unit of solid angle.[2][3] 1 spat is equal to 4π steradians[1][3] or approximately 41253 square degrees of solid angle (sequence A125560 in the OEIS).[2] Thus it is the solid angle subtended by a complete sphere at its center.[2]
See also
- Turn (angle) — the plane angle counterpart of the spat, equivalent to 2π radians
References
- ^ a b The Ultimate Online Reference for Engineers. Sunnyvale, California, USA: eFunda Inc. Retrieved 2015-10-19.
- ^ a b c Rowlett, Russ (2018). "A Dictionary of Units of Measurement". Chapel Hill: University of North Carolina. Retrieved 2024-07-10.
- ^ a b Glossary » Units » Solid Angle » Spat. Sunnyvale, California, USA: eFunda Inc.
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