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Planck's Hypothesis: Quantized Energy

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State

Max Planck resolved the blackbody puzzle by proposing energy is exchanged in discrete packets, each with energy equal to Planck's constant times frequency, E = hν.

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Restricting a vibrating source to discrete energy packets, rather than continuous values, correctly predicted the observed blackbody curves.

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Planck's quantized packets describe how energy is exchanged, not a claim that energy is literally countable pieces.