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physics blin recall, hius, good morning, (o)| |(o), | |, w, (_||||…

- - - - radio waves
      - microwaves
      - infared radiation
      - visible light
      - ultra violet
      - x rays
      - gamma rays
      - can travel in a vacuum
      - goes at the speed o light
      - we can see visible light
  - - - sound and ultra sound