PHYSICAL CONSTANTS (cgs)7
Physical Quantity
Boltzmann constant
Elementary charge
k
e
Symbol
me
mp
G
h
h = h=2
Speed of light in vacuum c
Proton/electron mass
mp =me
Electron mass
Proton mass
Gravitational constant
Planck constant
ratio
Electron charge/mass
ratio
Rydberg constant
Bohr radius
Atomic cross section
Classical electron radius
Thomson cross section
Compton wavelength of
electron
Fine-structure constant
e=me
2 4
R1 = 2chme
3
2
a0 = h =me2
a0 2
re = e2 =mc2
(8=3)re 2
h=me c
h=me c
= e2 =hc
,1
First radiation constant c1 = 2hc2
Second radiation
c2 = hc=k
constant
Stefan-Boltzmann
constant
Wavelength associated
with 1 eV
Value
Units
1:3807 10,16 erg/deg (K)
4:8032 10,10 statcoulomb
(statcoul)
,
28
9:1094 10
g
,
24
1:6726 10
g
6:6726 10,8 dyne-cm2 =g2
6:6261 10,27 erg-sec
1:0546 10,27 erg-sec
2:9979 1010 cm/sec
1:8362 103
5:2728 1017
statcoul/g
1:0974 105
5:2918 10,9
8:7974 10,17
2:8179 10,13
6:6525 10,25
2:4263 10,10
3:8616 10,11
7:2974 10,3
137:04
3:7418 10,5
1:4388
cm,1
cm
cm2
cm
cm2
cm
cm
erg-cm2 =sec
cm-deg (K)
5:6705 10,5 erg/cm2 sec-deg4
1:2398 10,4 cm
0
16
Physical Quantity
Frequency associated
with 1 eV
Wave number associated
with 1 eV
Energy associated with
1 eV
Energy associated with
1 cm,1
Energy associated with
1 Rydberg
Energy associated with
1 deg Kelvin
Temperature associated
with 1 eV
Avogadro number
Faraday constant
Gas constant
Loschmidt's number
(no. density at STP)
Atomic mass unit
Standard temperature
Atmospheric pressure
Pressure of 1 mm Hg
(1 torr)
Molar volume at STP
Molar weight of air
calorie (cal)
Gravitational
acceleration
0
Symbol
k0
Value
2:4180 1014
Units
Hz
8:0655 103
cm,1
1:6022 10,12 erg
1:9864 10,16 erg
13.606
eV
8:6174 10,5
eV
1:1604 104
deg (K)
NA
F = NA e
R = NA k
n0
6:0221 1023
2:8925 1014
8:3145 107
2:6868 1019
mol,1
statcoul/mol
erg/deg-mol
cm,3
mu
T0
p0 = n0 kT0
1:6605 10,24
273.15
1:0133 106
1:3332 103
g
deg (K)
dyne/cm2
dyne/cm2
V0 = RT0 =p0 2:2414 104
Mair
28.971
4:1868 107
g
980.67
17
cm3
g
erg
cm/sec2