BBC Learning Zone Clips

CLIP 12238

Types of light in the universe

Types of light in the universe
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Key Info
  • Types of light in the universe
  • Duration: 03:29
  • Professor Brian Cox describes the different types of light in the universe, most of which we cannot sense with our eyes. The different lights have different wavelengths. Infra red is an example which we experience as heat. There are also microwaves and radio waves which we can detect using an ordinary radio. If the radio is un-tuned we hear static. 1% of this is believed to be stretched light waves from just after the time of the Big Bang. As the universe expanded light waves were stretched to longer wavelength microwaves and radio waves. This cosmic microwave background (CMB) can only be seen by special cameras. Created especially for Class Clips from the BBC series Wonders of the Universe, first broadcast in April 2011.
  • Subject:

    Science

       Topic:

    Phys: Waves - Sound and Light

  • Keywords: electromagnetic spectrum, X-ray, UV, ultra-violet, IR, CMB, waves, radio waves, microwaves, light waves, wondersoftheuniverse
Ideas for use in class
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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