Value of Frequently Used Physical Constants
Download pdf | Name | Symbol | Value |
|---|---|---|
| Speed of light | c | $3\times{10}^{8}$ m/s |
| Planck constant | h | $6.63\times{10}^{-34}$ J s |
| hc | 1242 ev-nm | |
| Gravitation constant | G | $6.67\times{10}^{-11}$ m3kg-1 s-2 |
| Boltzmann constant | k | $1.38\times{10}^{-23}$ J/K |
| Molar gas constant | R | 8.314 J/(mol-K) |
| Avogadro's number | NA | $6.023\times{10}^{23}$ mol-1 |
| Charge of electron | e | $1.602\times{10}^{-19}$ C |
| Permeability of vacuum | $\mu_0$ | $4\pi\times{10}^{-7}$ N/A2 |
| Permitivity of vacuum | $\epsilon_0$ | $8.85\times{10}^{-12}$ F/m |
| Coulomb constant | $\frac{1}{4\pi\epsilon_0}$ | $9\times{10}^{9}$ N m2/C2 |
| Faraday constant | F | 96485 C/mol |
| Mass of electron | $m_e$ | $9.1\times{10}^{-31}$ kg |
| Mass of proton | $m_p$ | $1.6726\times{10}^{-27}$ kg |
| Mass of neutron | $m_n$ | $1.6749\times{10}^{-27}$ kg |
| Atomic mass unit | u | $1.66\times{10}^{-27}$ kg |
| Atomic mass unit | u | 931.49 MeV/c2 |
| Stefan-Boltzmann constant | $\sigma$ | $5.67\times 10^{-8}$ W/(m2 K4) |
| Rydberg constant | $R_\infty$ | $1.097\times{10}^{7}$ m-1 |
| Bohr magneton | $\mu_B$ | $9.27\times{10}^{-24}$ J/T |
| Bohr radius | $a_0$ | $0.529\times{10}^{-10}$ m |
| Standard atmosphere | atm | $1.01325\times{10}^{5}$ Pa |
| Wien displacement constant | b | $2.9\times{10}^{-3}$ m K |
