7df184c2-82ce-4a53-839b-0af6b62bcde6.jpeg

# PLANCK'S CONSTANT * Symbol: $h$ * Also Known As: Element of Action * Discovered By: Max Planck * Year: 1900 * Value: $6.62607015 \times 10^{-34} \text{ J s}$ * Alternate Value: $4.135667696 \times 10^{-15} \text{ eV s}$ ## What is Planck's Constant? Planck's constant is a physical c...

# PLANCK'S CONSTANT * Symbol: $h$ * Also Known As: Element of Action * Discovered By: Max Planck * Year: 1900 * Value: $6.62607015 \times 10^{-34} \text{ J s}$ * Alternate Value: $4.135667696 \times 10^{-15} \text{ eV s}$ ## What is Planck's Constant? Planck's constant is a physical constant that relates the energy of a photon to its frequency. It is a fundamental constant of nature and appears in many equations in quantum mechanics. $E = h f$ Where: * $E$ is the energy of the photon * $h$ is Planck's constant * $f$ is the frequency of the photon Planck's constant is also used to define the quantization of other physical quantities, such as angular momentum. ## How is Planck's Constant Used? Planck's constant is used in many areas of physics, including: * Quantum mechanics * Solid-state physics * Particle physics * Cosmology It is also used in many practical applications, such as: * Lasers * Semiconductors * Medical imaging ## Fun Fact Max Planck originally called it "element of action" because of its role in the quantum theory.