Physical and astronomical constants to remember for Competitive Exams

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Physical and Astronomical Constants
Physical and astronomical constants

Speed of light in vacuo

Elementary charge

Neutron rest mass

Proton rest mass

Electron rest mass

Planck’s constant

Dirac’s constant

Boltzmann’s constant

Gravitational constant

Stefan- Boltzmann constant

First Radiation Constant

Second Radiation Constant

Permittivity of free space

Permeability of free space

Avogadro constant

Gas constant

Bohr radius

Bohr magneton

Fine structure constant

Solar Mass

Solar radius

Solar luminosity

Earth mass

Mean earth radius

1 light year

Mean earth radius

1 AU

Astronomical unit

1 pc


1 year