Other questions in this quiz

2. What type of lens is used for short sighted people?

  • Concave/diverging
  • Convex/converging

3. 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

4. The curvier the lens..

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

5. What is refractive index?

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

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