The Planck scale is often described as the arena in which both quantum mechanical and gravitational effects come into play. The Planck length is tiny (compared to the sizes of everyday things) and the Planck mass is huge (compared to the mass/energy of elementary particles). In this episode of Your Daily Equation, join Brian to understand where the Planck values come from. | World Science Festival

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Quantum mechanics originated from Max Planck's attempt to solve the black body radiation problem—how ideal objects emit electromagnetic radiation. Classical physics predicted infinite energy at high frequencies (the "ultraviolet catastrophe"), but experiments showed radiation peaks and then falls. Planck resolved this by proposing that energy is quantized in discrete units of hf (frequency times Planck’s constant), introducing the concept of energy quantization and the foundation of quantum mech