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The general theory of relativity

Einstein’s general theory of relativity revolutionised the way physicists think about light and gravity. Stuart Farmer explains the basic ideas of the theory

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.

Thinking about motion in a zero and a non-zero gravitational field, and comparing the path of an object in free fall with that of a light ray, led Einstein to produce his general theory of relativity.

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