Experimental Determination of Planck’s Constant

Experimental determination of Planck’s constant is done by the photoelectric effect. In this experiment, the energy of the electron emitted from a metal surface is precisely measured when light strikes it.

Also measuring the frequency of the incident light, a direct relationship can be found between the energy of the photons and the frequency of the light, that’s Planck’s constant. Accuracy of these experiments perfectly validate Max Planck’s theory, and in turns strengthening our understanding of the quantum world.

Reduced Planck Constant

Frequency is measured using hertz. A 360° cycle or one full Bohr introduced the quantity ℏ = ℎ/2π , Its value is 1.054571817×10⁻³⁴ joule seconds, known as the reduced Planck constant, represents the quantum of angular momentum and more commonly used in modern physics.

Planck’s Constant is one of the smallest constants used in physics. It is a fundamental constant in quantum mechanics which relates the energy of a photon to its frequency. Planck constant stands as one of the most elegant and pivotal values in the realm of physics, where constants shape the very essence of this physical world.

Further in this article, we will learn about its definition, who Max Planck was, explore methods for calculating its value in various units, its formula, dimension, and unit. We will look into what’s a Reduced Planck Constant and discuss the application of Planck’s constant across various scientific disciplines.