According to the ray model of light, light travels in a straight line. When light hits a translucent surface it is scattered, and transparent materials let light pass through unobscured. Cardboard is opaque as it does not let light pass through, while wax paper is translucent since it scatters light. The object with the larger shadow is closer to the light source.

1. Science 8 Trivia Review for Optics Quiz #2 March 2009

2. According to the ray model of light, how does light behave ? Travels in a straight line

3. What happens to light when is hits a translucent surface? Scattered

4. The type of material that lets light pass through unobscured is referred to as _________? Transparent

5. Cardboard is an example of what classification of material? Opaque

6. Wax paper is an example of what classification of material? Translucent

7. When a single light source casts shadows of two objects, the object with the larger shadow is ______ the light source Closer to

8. What is the law of reflection? < incidence = < reflection

9. The imaginary line perpendicular to the reflecting surface is called the ______. Normal

10. According to the law of reflection, light rays that hit a mirror at an angle of incidence of 35 ° must reflect off at what angle? 35°

11. Plane is another word for _______ Flat

12. In the diagram below, b represents what? Angle of incidence

13. In the diagram below, c represents what? Normal

14. In the diagram below, e represents what? Reflected Ray

15. Draw the appropriate normal and reflected ray:

16. Refraction is caused by light changing _____ as it moves from one medium to another Speed

17. Light travels ______ in glass than in air. Slower

18. When a light ray passes from a more dense to less dense medium, it will bend _______ the normal. Away From

19. Is the following diagram accurate? Yes or No? NO

20. When light rays pass from air into glass, they bend _____the normal as they move into a material with a ______ density a) toward the normal; greater density b) away from the normal; greater density c) toward the normal; lower density d) away from the normal; lower density a) toward, greater

21. Is the following mirror converging or diverging? Converging

22. The point where converging light rays meet is called what? Focal Point

23. What shape is a diverging mirror? Convex

24. The image seen in a distant (far away) concave mirror appears to be _______. Smaller & Upside down

25. What type of mirrors are used in side view mirrors of vehicles? Convex

26. Make-up mirrors are an example of what type of mirror? Concave

27. Is the following lens converging or diverging? Diverging

28. A convex lens is thickest at the _______ Middle

29. Draw what would happen to the light rays as they pass through the double concave lens?

30. Is the following lens converging or diverging? Converging

31. A magnifying glass is an example of what type of lens? Convex

32. Draw the light rays emerging from the convex lens:

33. A diverging lens is thickest at the ______ Edges

34. A clear image can only be projected onto a screen using a _____ lens Convex