🧪ap chemistry review

Planck's Constant

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

Planck's constant is a physical constant that is the quantum of electromagnetic action which relates the energy carried by a photon to its frequency. Its symbol is h and it has a value of 6.62607015 × 10^-34 m^2 kg / s.

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