Visible light and the solar system

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1. How do you find a focal length?

  • By focusing a distant object on a piece of paper through the lens. The focal length is the distance between the centre of the lens and the image.
  • By measuring the distance between the focal point and the image.
  • By using a mirror.
  • By measuring the angle of refraction.
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2. Waves are reflected at...

  • ...any point.
  • ...one specific angle.
  • ...boundaries between different materials.
  • ...mirrors.

3. How did Galileo prove that not everything orbited the earth?

  • He observed that 4 of Jupiter's moon's orbited Jupiter.
  • He showed that everything did orbit the earth.
  • He was told by Copernicous
  • He observed that 4 of Saturn's moon's orbited Saturn.

4. The amplitude of a wave is...

  • The distance from a point on one wave to the same point on the next wave
  • The maximum distance of a point on the wave from its rest position.
  • How fast a wave travels.
  • The number of waves passing a point each second.

5. What type of waves are electromagnetic waves?

  • Tranverse.
  • Seismic.
  • Longitudinal.
  • Sound.
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