# formulae - SOME USEFUL CONSTANTS/CONVERSIONS h =...

This preview shows pages 1–2. Sign up to view the full content.

SOME USEFUL CONSTANTS/CONVERSIONS h = 6.6262(-27) erg-s c = 2.99792458(10) cm/s k = 1.380622(-16) erg/K k/hc = 0.695 cm -1 /K h = 1.0545(-27) erg-s 1 Å = 10 -8 cm 1 eV = 1.602(-12) erg μ b /h = 1.400 MHz/Gauss c = λν 1 cm -1 "=" 29.979 GHz SOME USEFUL EXPRESSIONS R u<-l = 2 π /3 h 2 ρ ( ν ul ) | μ ul | 2 (cgs) H' = - μ E (electric interaction) H' = - m B (magnetic interaction) where μ m = - μ b L /h - 2 μ b S /h μ b = Bohr Magneton A ul (cgs) = 32 π 3 ν ul 3 | μ ul | 2 / 3 h c 3 B ul (cgs) = 2 π /3 h 2 | μ ul | 2 (cgs) ρ T ( ν ) = { 8 π h ν 3 /c 3 }{exp(h ν /kT) - 1} -1 I( ν )d ν = ( c/4 π ) ρ T ( ν ) I( ν ) = I 0 ( ν ) exp(- κ ν x) κ ν d ν = 8 π 3 ν ul n l | μ ul | 2 / 3hc τ ν = κ ν x path length l κ ν max = 8 π 2 ν ul n l | μ ul | 2 / 3hc Δν ( Lorentzian) κ ν = κ ν max Δν 2 /{ ( ν−ν ul ) 2 + Δν 2 } (Lorentzian shape; Δν = HWHM) E n (eV) = -13.60 Z 2 /n 2 E n1,n2,. . (eV) = -13.60 Z

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 06/13/2011 for the course PHYSICS 780.04 taught by Professor Staff during the Winter '07 term at Ohio State.

### Page1 / 3

formulae - SOME USEFUL CONSTANTS/CONVERSIONS h =...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online