Niels Bohr Quote

It seems necessary to introduce in the laws in question a quantity foreign to classical electrodynamics, I.e., Planck's constant, or as it is often called, the elementary quantum of action.


On the Constitution of Atoms and Molecules, Philosophical Magazine, Volume 26, 1913 (p. 2)


It seems necessary to introduce in the laws in question a quantity foreign to classical electrodynamics, I.e., Planck's constant, or as it is often...

It seems necessary to introduce in the laws in question a quantity foreign to classical electrodynamics, I.e., Planck's constant, or as it is often...

It seems necessary to introduce in the laws in question a quantity foreign to classical electrodynamics, I.e., Planck's constant, or as it is often...

It seems necessary to introduce in the laws in question a quantity foreign to classical electrodynamics, I.e., Planck's constant, or as it is often...