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EU:  DEGREE_ARC

Status: STD 2005/06/07
Code: 40
Symbol: °
EQ label: PLANE_ANGLE
 
Quantities associated with this Unit
Quantity: angle (plane angle)
Concept definition: s/r, where s is the length of the included arc of a circle between two radii of the circle [ISO 80000-3:2006, item 3-1.8] and r is the radius of the circle [ISO 80000-3:2006, item 3-1.5].
1° = (π / 180) rad (exactly).
 
Reference type: PR
Reference: [ISO 80000-3:2006, item 3-5.b]
Supplemental references: [ISO 80000-1:2009, Table 5, "plane angle"]
Quantity: Bragg angle
Concept definition: The angle θ, where 2d sin θ = n λ, d is the lattice plane spacing [ISO 80000-12:2009, item 12-3], λ is the wavelength [ISO 80000-7:2008, item 7-3] of the radiation, and n is an integer.
 
Reference type: PR
Reference: [ISO 80000-12:2009, item 12-4.b]
Supplemental references:  

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