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What is red-shift?

Light from the elements in a galaxy's stars produces a pattern of wavelengths. For most distant galaxies, the whole pattern is observed at longer wavelengths than the same pattern measured in a laboratory. Each absorption line is shifted by the same fraction of its laboratory wavelength, so the pattern keeps the same relative spacing.

8.2 Red-shift Lesson

GCSE
Physics
8.2 Red-shift

Step-by-step lessons covering AQA GCSE Physics 8.2 Red-shift for Foundation and Higher tier. Each lesson breaks down 8.2 Red-shift, then works through exam-style questions in Paper 1 and Paper 2 format. Build a strong grip on equations, units and Key Stage 3 fundamentals before tackling the more demanding topics like electromagnetism, the particle model of matter and space physics.

Lessons

x

What is red-shift?

Light from the elements in a galaxy's stars produces a pattern of wavelengths. For most distant galaxies, the whole pattern is observed at longer wavelengths than the same pattern measured in a laboratory. Each absorption line is shifted by the same fraction of its laboratory wavelength, so the pattern keeps the same relative spacing.

8.2 Red-shift Lesson

GCSE
Physics
8.2 Red-shift

Step-by-step lessons covering AQA GCSE Physics 8.2 Red-shift for Foundation and Higher tier. Each lesson breaks down 8.2 Red-shift, then works through exam-style questions in Paper 1 and Paper 2 format. Build a strong grip on equations, units and Key Stage 3 fundamentals before tackling the more demanding topics like electromagnetism, the particle model of matter and space physics.