1. Jeopardy
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2. Lenses 10 Points 10 Points 10 Points 10 Points 10 Points 20 Points
Reflection
& Mirrors
Definitions
Refraction
Lenses
Angles
& Optical
Phenomena
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30 Points
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50 Points
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50 Points

3. In reflection:
Angle of incidence =

4. What is the angle of reflection

5. A mirror shaped like part of a sphere in which the inner surface is reflective

6. What is a concave mirror

7. Line through the centre of the centre of curvature to the midpoint of the mirror

8. What is the principal axis

9. A mirror shaped like part of a sphere in which the outer surface is reflective

10. What is a covex mirror

11. Point where the principal axis meets the mirror

12. What is the vertex

13. The ray that bounces off a reflective surface

14. What is a reflected ray

15. The angle between the incident ray and the normal

16. What is the angle of incidence

17. The perpendicular line to the mirror surface

18. What is the normal

19. Define apparent depth

20. The depth that an object appears to be due to the refraction of light in a transparent medium

21. Define mirage

22. What is a virtual image that forms as a result of refraction and total internal reflection in Earth’s atmosphere

23. The substance or material that light is travelling through (e. g
The substance or material that light is travelling through (e.g. water, air, glass, oil)

24. What is a medium

25. Define Refraction

26. What is the change in direction of light as it moves from one medium to another “bending of light”

27. Why does refraction happens?

28. What is speed of light changes

29. 2 conditions for refraction to occur

30. 1- light must change media (change speed when crossing the boundary)
What is
1- light must change media (change speed when crossing the boundary)
2- light must approach the boundary at an angle

31. The ratio of the speed of light in a vacuum (c) to the speed of light in a given material (v).

32. What is the index of refraction

33. Lens that is thickest in the middle (light rays bend through a single point)

34. What is a converging lens

35. Lens that is thinnest in the middle (light rays spread apart)

36. What is a diverging lens

37. Point at the exact centre of a the lens

38. What is an optical centre

39. The point at the principal axis of a lens where light rays parallel to the principal axis converge after refraction

40. What is the principal focus

41. Which lens ALWAYS produces a smaller, upright, virtual image?

42. What is a diverging lens

43. Angle of incidence that results in angle of refraction of 90˚

44. What is a critical angle

45. The situation when the angle of incidence is greater than the critical angle

46. What is total internal reflection

47. Technology that uses light to transmit information along a glass cable

48. What is Fibre optics

49. Optical phenomenon that is produced by water droplets in Earth’s atmosphere

50. What is a rainbow

51. 3 changes in direction of light when it interacts with a raindrop to form a rainbow

52. What is
1- refraction (air to water),
2- partial internal reflection,
3- refraction (water to air)