Explain, in one or two sentences, why the energy of an individual photon remains the…

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

Explain, in one or two sentences, why the energy of an individual photon remains the same when it enters a glass slab even though its speed and wavelength change inside the slab.

Related theory

Quantum Explanation of PE
Photoelectric effect
Dual Nature of Radiation and Matter
Photons and particle nature

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