Visible light and the solar system

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1. How does a reflecting telescope work?

  • It has an objective lens in which the light is reflected.
  • Using an objective lens and an eyepiece lens.
  • The curved primary mirror focuses light rays from a distant object to an image in the same way as the objective lens in a refracting telescope. This image is then magnified by the eyepiece lens, also just like a refracting telescope.
  • By making light travel through more than one material so that it is refracted.
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2. What is the geocentric model?

  • The idea that the earth is the center of everything.
  • A model by Nicholaus Copernicus
  • The idea that the sun is the center of everything.
  • The idea that planets moved in orbits

3. 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.

4. How do you find a focal length?

  • By using a mirror.
  • By measuring the angle of refraction.
  • 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.

5. What type of waves are electromagnetic waves?

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


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