Arno Penzias and Robert Wilson with their horn antenna in the background
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.
The universe is full of electromagnetic radiation, now in the microwave region, left over from the Big Bang origin of the universe. Its existence verifies the Big Bang theory. The radiation obeys Planck’s law and his theory of radiation, and its wavelength is related to the temperature of space.
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