engineering fundamentals Convert Solid angle Units
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steradian
Symbol:  sr 
Category:  Solid angle 
SI Equivalent:  1 sr
Dimension W 
System:  SI 
 
Notes
Unit used to measure solid angle in the SI system. It is defined as 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. The total solid angle around a point is equal to 4p.
Convert     sr  
1 sr =
Solid angle
  Symbol Unit Name
7.95773×10-2  sp  spat 
1.18181×107  sq '  square arcminute 
4.25452×1010  sq "  square arcsec 
3282.84  sq °  square degree 
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