BRAINCAKEThe Energy of a Photon and the Planck Constant
Max Planck discovered that light appears to exist as little packets called quanta. Einstein coined the term photons for these packets. The Energy of a photon is directly proportional to its frequencyE - is the energy of a photonF- is the frequency is the Planck constant which is 6.63 × 10-34 Js the equation has both wave elements (λ) and particle elements (E)To determine the value of the Planck constant an LED can be usedLEDs emit light when the p.d. across them reaches a threshold.
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Key terms in this lesson
- work done
- The energy transferred when a force moves its point of application through a distance in the direction of the force.
- energy
- The capacity of a system to do work.
- frequency
- The number of complete oscillations or wavelengths passing a given point per unit time.
More in Quantum Physics
- The Electron Volt
- The Photoelectric Effect
- The Photoelectric Effect Equation and Wave-Particle Duality
All 4 lessons in Quantum Physics · All OCR AS-level Physics topics