Other questions in this quiz

2. Which type of scanning ionising?

  • Microwaves
  • X-rays
  • Ultrasound

3. The curvier the lens..

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

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

  • Where the axis crosses the lens
  • Where rays hitting the lens parallel to the axis appear to come from
  • where rays hitting the lens parallel to the axis all seem to meet

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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