Planck Constant Measurement

The Planck constant is a fundamental value in physics that relates the energy of a photon to its frequency. To measure it, scientists use precise experiments involving electrons or light. For example, by shining light on a material and measuring electron ejection (photoelectric effect), or analyzing the spacing of energy levels in atoms, they can determine how energy and frequency are connected. These measurements help establish the exact value of the Planck constant, which is essential for understanding quantum mechanics and defining units like the kilogram. Accurate measurements require sophisticated equipment and careful analysis to ensure precision.