6. Draw a diagram of a man 1.8 m tall looking at his image in a plane mirror. Show the incident and refl ected rays as well as the normal and the virtual image.
7. A boy wishes to look over a wall but it is too high. Draw a diagram to show how he might use two mirrors and a tube to see over the wall. Include all relevant light rays.
8. Give three uses of plane mirrors. 9. Explain lateral inversion. 10. Defi ne parallax.
11. How could a student minimise errors when reading a ruler?
H FIG. 12.14 FIG 12 14
13. How would you convince someone who thinks that light emitted from their eyes enables them to see is incorrect?
14. Which capital letters of the English alphabet have identical laterally inverted images?
15. What is the minimum height of plane mirror required for a 1.7 m tall woman to view herself? Illustrate your answer with a ray diagram.
12. Why do some ambulances display the word AMBULANCE laterally inverted?
