Planck's law
Planck's law describes how objects emit radiation based on their temperature. It states that hotter objects radiate more energy and emit it at shorter wavelengths, which is why an iron rod glows red when heated and turns blue as it gets even hotter. The law provides a mathematical framework to predict the intensity and wavelength of the radiation emitted by an idealized black body—a perfect emitter and absorber of energy. This understanding is fundamental to fields like astrophysics, climate science, and the development of technologies such as thermal imaging and LEDs.
Additional Insights
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Planck's Law describes how objects emit thermal radiation based on their temperature. It explains that hotter objects emit more radiation and at shorter wavelengths, meaning they glow in colors ranging from red to blue as they heat up. This law is fundamental in understanding how light and heat are produced by everything from light bulbs to stars. It also lays the groundwork for quantum mechanics by introducing the idea that energy is emitted in discrete units called quanta, impacting both physics and our understanding of the universe.