Environmental Data Coding Specifcation        ISO IEC LogosRight Title Graphic
Home Browse Search Download Submissions FAQs Contact


Status: STD 2005/06/07
Code: 40
Symbol: °
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:  

Bottom Bar Graphic

 Send mail to webmaster with questions or comments about this web site.