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The terms in bold link to topics in the AQA, Edexcel, OCR, WJEC and CCEA A-level specifications, as well as the IB, Pre-U and SQA exam specifications.
Quantum physics applies not only to the very small, but also to our everyday lives. Photons carry quanta of energy according to Planck’s equation. This idea explains the black body spectrum and the photoelectric effect. The energy of electrons in atoms is quantized, and this explains emission line spectra, the idea underlying fluorescent tubes and atomic clocks. Nuclear fusion in the Sun relies on an idea known as quantum tunnelling.
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