The Big Bang, red-shift and the expanding Universe
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Light waves, colour, and the key equation

Light waves, colour, and the key equation

Wave sketches comparing blue light with shorter wavelength and red light with longer wavelength, showing how wavelength and frequency are related

Light from stars and galaxies is an electromagnetic wave, and visible light is only a small part of the electromagnetic spectrum.

The Big Bang, red-shift and the expanding Universe Lesson

  1. GCSE
  2. /Physics
  3. /The Big Bang, red-shift and the expanding Universe