Just thanck Planck; Quantum theory's centenary.(Science and Technology)(Quantum theory is about to celebrate its centenary)(Max Planck)

From: The Economist (US) | Date: December 9, 2000 | Copyright information

ONE hundred years ago this month, a light-bulb lit up over a physicist's head-and he wondered what made it yellow. For, while the yellow colour of a bulb suggests that it is giving off most of its light at that easily visible frequency, the physics he had been taught predicted that a heated object should emit mostly shorter-wavelength radiation, which is invisible. Max Planck presented his explanation for this troubling observation, known as the black-body radiation problem, in a l...

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