Part 3: Space and Time7 of 42 entries
3-2
curvaturekappa
inverse of the radius of curvature (t3-1.12)
3-20
repetency, wavenumbersigma
inverse of the wavelength (t3-19)
3-21
wave vectorbb(ii(k))
vector normal to the surfaces of constant phase angle (t3-7) of a wave, with the magnitude (iso80000-2) of repetency…
ent
3-22
angular repetency, angular wavenumberk
magnitude (iso80000-2) of the wave vector (t3-21)
ent
3-26.1
attenuation, extinctionalpha
gradual decrease in magnitude (iso80000-2) of any kind of flux through a medium
3-26.2
phase coefficientbeta
change of phase angle (t3-7) with the length (t3-1.1) along the path travelled by a plane wave
ent
3-26.3
propagation coefficientgamma
measure of the change of amplitude and phase angle (t3-7) of a plane wave propagating in a given direction
ent
Part 7: Light and Radiation2 of 66 entries
Part 10: Atomic and Nuclear5 of 125 entries
10-7
Rydberg constantR_(oo)
spectroscopic constant that determines the wave numbers of the lines in the spectrum of hydrogen: where is the…
ent
10-42.1
volumic cross section, macroscopic cross section <atomic physics>ii(Sigma)
product of the number density of the atoms and of the cross section (t10-38.1) for a given type of atoms:
ent
10-42.2
volumic total cross section, macroscopic total cross section <atomic physics>ii(Sigma)_"tot"
product of the number density of the atoms and the cross section (t10-38.1) for a given type of atoms:
ent
10-49
linear attenuation coefficient <ionizing radiation>mu
for uncharged particles of a given type and energy the differential quotient with respect to , where is the fraction of…
10-58
linear ionizationN_("i"l)
differential quotient of with respect to , where is the average total charge (iec80000-6) of all positive ions produced…
Part 12: Condensed Matter5 of 60 entries
12-2.1
angular reciprocal lattice vectorbb(ii(G))
vector whose scalar products with all fundamental lattice vectors are integral multiples of
ent
12-2.2
fundamental reciprocal lattice vectorsbb(ii(b))_1, bb(ii(b))_2, bb(ii(b))_3
fundamental translation vectors for the reciprocal lattice
ent
12-9.1
angular wavenumber, angular repetency <condensed matter physics>k
quotient of momentum (iso80000-4) and the reduced Planck constant (iso80000-1)
ent
12-9.2
Fermi angular wavenumber, Fermi angular repetencyk_"F"
angular wavenumber (t12-9.1) of electrons in states on the Fermi sphere
12-9.3
Debye angular wavenumber, Debye angular repetencyq_"D"
cut-off angular wavenumber (t12-9.1) in the Debye model of the vibrational spectrum of a solid