Lesson 2

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Lesson 2

  1. 1. What do these images have in common?
  2. 2. Lesson 2 Radiation Journeys
  3. 3. The Sun emits every kind of electromagnetic radiation, but only parts of the spectrum get through the atmosphere.
  4. 4. <ul><li>The electromagnetic spectrum is the whole ‘family’ of radiations, which are like light: the space rainbow. </li></ul><ul><li>They can all travel through a total vacuum at the same incredibly high speed of 300 000 000 m/s. </li></ul><ul><li>They are all given off by stars like the Sun, but some of them are absorbed by the Earth’s atmosphere. </li></ul>The electromagnetic spectrum
  5. 5. Visible light gets through the atmosphere. Some UV also reaches us.
  6. 6. Telescopes on Earth can detect visible radiation from objects in space.
  7. 7. Radio radiation can penetrate our atmosphere.
  8. 8. To detect other kinds of radiation, like infrared, UV and X-rays, it’s better to launch the telescopes into space.
  9. 9. This is a visible light photograph of the Sun, taken from the Earth’s surface.
  10. 10. This is a picture made with UV light by a satellite above the atmosphere.
  11. 11. X-rays from the Sun. This is another satellite image.
  12. 12. A radio telescope on Earth produced this picture.
  13. 13. Pictures made with different types of radiation show different features of the Sun.

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