Planck's law of black-body radiation

Planck's law describes how a perfect black body emits electromagnetic radiation at different wavelengths or colors, depending on its temperature. It shows that hotter objects emit more radiation overall and shift toward higher-energy (bluer) wavelengths, while cooler objects emit less and glow with red or infrared light. The law accurately explains the spectrum of radiation from objects like stars or heated materials, resolving earlier scientific puzzles and laying the foundation for quantum physics. In essence, it details how energy is emitted at various wavelengths based on temperature, providing a precise mathematical relationship for black-body radiation.