Physics 3

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  • Created by: Sarah
  • Created on: 22-03-14 14:51

1. What is refractive index?

  • The ratio of speed to light in a vacuum to in the medium
  • the incident ray parallel to the principal focus
  • The refracted ray parallel to the principal focus
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2. The curvier the lens..

  • the more powerful it is
  • the less powerful it is
  • it doesn't make a difference

3. Pressure in a liquid is..

  • transmitted equally in all directions
  • hard to measure
  • difficult to see

4. What is the principal focus (converging lens)?

  • where the eye focuses
  • where rays hitting the lens parallel to the axis all seem to meet
  • Where the axis crosses the lens

5. How can you tell something is a real image?

  • the light can produce an image on the screen
  • it can be seen with a magnifying glass
  • it can be seen on a TV

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