SACE Physics — Stage 2

Photons — Flashcards & Quiz

Photons are discrete packets of electromagnetic energy, introduced by Einstein in 1905 to explain the photoelectric effect. SACE Physics Stage 2 tests the Einstein equation (hf = φ + KE_max), the concept of threshold frequency, and how the photon model succeeds where classical wave theory fails. Know the experimental setup and be ready to interpret graphs.

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Last updated: March 2026