Starter quiz

  • When a wave crosses a boundary and changes direction, this is called ______.
    • 'refraction' ✓
  • Which diagram shows the ray moving from air into glass and bending in the correct direction?
  • Which diagram shows the ray moving from glass into air and bending in the correct direction?
  • In a ray diagram, a normal line is often drawn. Which of the following statements about the normal are correct?
    • It is an imaginary line.  ✓
    • It is parallel to the boundary.
    • It is perpendicular to the boundary.  ✓
    • Its length equals the wavelength of the wave.
    • It passes through the point where the ray hits the boundary.  ✓
  • Which of the following statements about the apple shown is correct?
    Which of the following statements about the apple shown is correct?
    • The apple reflects light.  ✓
    • The apple refracts light.
    • Light coming from a point on the apple always travels in a single direction.
    • Light travelling from the apple in one direction all comes from one point.
  • Which of the following ray diagrams is correct?
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