Physics Origins of the Universe

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Red-shift

  • Current evidence suggests that the universe is expanding and that space expanded violently and rapidly from a very small initial 'point'
  • The Big Bang Theory: states that originally all the matter in the universe was concentrated into a single incredibly tiny point
  • This began to expand rapidly in a hot explosion and is still expanding today
  • The Big Bang happened about 13.7 million years ago
  • Doppler effect
  • Sirens: high-pitched when they come towards then low-pitched as it goes away
  • When an object moves away from its observer, its light is affected by the Doppler effect
  • The Sun contains helium, we know this because there are black lines in the spectrum…

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