Question

what is Plancks constant​

Answer 1

Answer:

Afundamental constant, equal to the energy of a quantum of electromagnetic radiation divided by its frequency, with a value of 6.626 × 10 - 34 joule- seconds

Answer 2

The Planck constant is a physical constant that is the quantum of electromagnetic action, which relates the energy carried by a photonto its frequency. A photon's energy is equal to its frequency multiplied by the Planck constant. The Planck constant is of fundamental importance in quantum mechanics, and in metrology it is the basis for the definition of the kilogram.