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. ✓
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- 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.
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- Which of the following ray diagrams is correct?
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