Planck's law of blackbody radiation fixed the ultraviolet catastrophe and gave quantum theory its opening

Popularity Index: 2 Updated at 2026-10-12 14:33 UTC

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Faraday's law of induction underlies generators and explains why a changing magnetic field drives a current The second law of thermodynamics says entropy increases in a closed system — which is why perpetual motion machines stay impossible Energy conservation holds exactly in classical mechanics but bends in general relativity when the universe expands Entropy increase gives time its arrow — so most other physical laws look the same run backwards Noether's theorem connects every continuous symmetry to a conservation law Newton's inverse square law of gravity breaks down near Mercury and inside strong fields where general relativity takes over Charles's law and the ideal gas law fail at high pressure and low temperature where interactions matter Optical laws like Snell's law in reflection and refraction are the short-wavelength limit of wave behavior Boyle's law describes gas pressure and volume only as long as the gas stays dilute Hooke's law of spring extension holds only within the elastic limit before a material yields

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