| Status: |
STD 2005/06/07 |
| Code: |
76 |
| Symbol: |
1/m |
| EQ label: |
INV_LENGTH |
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| Quantities associated with this Unit |
|---|
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| Quantity: |
fundamental reciprocal lattice vectors
|
| Concept definition: |
The fundamental translation vectors for the reciprocal lattice. |
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| Reference type: |
PR |
| Reference: |
[ISO 80000-12:2009, item 12-2.a and item 12-2.2] |
| Supplemental references: |
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| Quantity: |
curvature
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| Concept definition: |
1/ρ, where ρ is radius of curvature [ISO 80000-3:2006, item 3-1.13]. |
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| Reference type: |
PR |
| Reference: |
[ISO 80000-3:2006, item 3-2.a] |
| Supplemental references: |
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| Quantity: |
wavenumber (repetency)
|
| Concept definition: |
1/λ, where λ is wavelength [ISO 80000-3:2006, item 3-17]. |
| |
| Reference type: |
PR |
| Reference: |
[ISO 80000-3:2006, item 3-18.a] |
| Supplemental references: |
[ISO 80000-8:2007, item 8-6.a] |
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| Quantity: |
angular repetency (angular wavenumber)
|
| Concept definition: |
2π σ, where σ is wavenumber [ISO 80000-3:2006, item 3-18]. |
| |
| Reference type: |
PR |
| Reference: |
[ISO 80000-3:2006, item 3-19.b] |
| Supplemental references: |
[ISO 80000-12:2009, item 12-10.b] |
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| Quantity: |
linear attenuation coefficient (linear extinction coefficient)
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| Concept definition: |
μ(λ) = (1/Φλ(λ)) (dΦλ(λ)/dl), where dΦ/Φ is the relative decrease in the spectral radiant flux [ISO 80000-7:2008, item 7-13] Φ of a collimated beam of electromagnetic radiation corresponding to the wavelength lambda; [ISO 80000-7:2008, item 7-3.2] during traversal of an infinitesimal layer of a medium and dl is the length [ISO 80000-3:2006, item 3-1.1] traversed. |
| |
| Reference type: |
PR |
| Reference: |
[ISO 80000-7:2008, item 7-25.a and item 7-25.1] |
| Supplemental references: |
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| Quantity: |
lens power
|
| Concept definition: |
Algebraic quantity characterizing the focusing properties of an optical system, thus 1/f where f is the object focal distance [ISO 80000-7:2008, item 7-59.3]. |
| |
| Reference type: |
PR |
| Reference: |
[ISO 80000-7:2008, item 7-60.a] |
| Supplemental references: |
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| Quantity: |
volumic cross-section (macroscopic cross-section)
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| Concept definition: |
The sum of the cross-sections [ISO 80000-10:2009, item 10-39.1] for a reaction or process of a specified type over all atoms or other entities in a given 3D domain, divided by the volume [ISO 80000-3:2006, item 3-4] of that domain. |
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| Reference type: |
PR |
| Reference: |
[ISO 80000-10:2009, item 10-43.a] |
| Supplemental references: |
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| Quantity: |
linear ionization
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| Concept definition: |
(1/e) (dQ/dl), where e is the elementary charge and dQ is the average total charge of all positive ions produced over an infinitesimal element of the path with length dl [ISO 80000-3:2006, item 3-1.1] by an ionizing charged particle. |
| |
| Reference type: |
PR |
| Reference: |
[ISO 80000-10:2009, item 10-60.a] |
| Supplemental references: |
|
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| Quantity: |
angular reciprocal lattice vector
|
| Concept definition: |
A vector whose scalar products with all fundamental lattice vectors are integral multiples of 2π. |
| |
| Reference type: |
PR |
| Reference: |
[ISO 80000-12:2009, item 12-2.a and item 12-2.1] |
| Supplemental references: |
|
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| Quantity: |
angular repetency (angular wavenumber)
|
| Concept definition: |
ω/c = 2π/λ, where ω is angular frequency [ISO 80000-8:2007, item 8-4], c is phase speed of sound [ISO 80000-8:2007, item 14.1], 2π is the phase difference, and λ is wavelength [ISO 80000-8:2007, item 8-5]. |
| |
| Reference type: |
PR |
| Reference: |
[ISO 80000-8:2007, item 8-7.b] |
| Supplemental references: |
|
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| Quantity: |
linear attenuation coefficient
|
| Concept definition: |
(1/J) (dJ/dχ), where J is magnitude of the current rate [ISO 80000-10:2009, item 10-49] of a beam of particles parallel to the χ direction. |
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| Reference type: |
PR |
| Reference: |
[ISO 80000-10:2009, item 10-50.a] |
| Supplemental references: |
|
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| Quantity: |
linear absorption coefficient
|
| Concept definition: |
(1/Φλ(λ)) (dΦλ(λ)/dl), where dΦ/Φ is the relative decrease, caused by absorption, in the spectral radiant flux [ISO 80000-7:2008, item 7-13] Φ of a collimated beam of electromagnetic radiation corresponding to the wavelength lambda; [ISO 80000-7:2008, item 7-3.2] during traversal of an infinitesimal layer of a medium and dl is the length [ISO 80000-3:2006, item 3-1.1] traversed. |
| |
| Reference type: |
PR |
| Reference: |
[ISO 80000-7:2008, item 7-25.a and item 7-25.2] |
| Supplemental references: |
|
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