1. Q4T2 Review

2. 1. The bending of a light ray as it travels from air into water is known as:
refraction.

3. 2. You can clearly see yourself in a flat (plane) mirror because of which kind of reflection?
Specular

4. 3. The diagram below represents a light ray striking a flat mirror:
What is the value in degrees for the angle of incidence?
35º

5. 4. The line drawn on a ray diagram perpendicular to the surface at the point where the incoming light strikes the surface is called the: normal line.

6. 5. According to the law of reflection, the angle of incidence is always:
bigger than the angle of reflection.
equal to the angle of reflection.
smaller than the angle of reflection.
determined by measuring between the incident and reflected rays.

7. 6. The type of reflection in which the light is scattered into many directions is known as: diffuse.

8. 7. The light ray which strikes the surface of an optical device is known as the ____ ray. incident

9. 8. A converging lens ALWAYS:
causes light rays come together.
makes objects viewed through them appear smaller.
causes light rays to spread apart.
distorts light by reflecting it in different directions.

10. 9. Tissue paper is best described as a(n) ____ material. translucent

11. 10. Our vision is based on what color process?
the additive color process.

12. 11. Rod cells respond to:
white, black, and gray.

13. 12. A glass window is best described as a(n) ____ material. transparent

14. 13. Color televisions produce images by mixing dots of:
red, green, and blue.

15. 14. The subtractive primary colors are:
cyan, magenta, and yellow.

16. 15. Color blindness is a condition that affects what? The cone cells.

17. 16. A straw will appear broken in a glass of water because light traveling from air to water is: refracted

18. 17. The speed of light is such an important speed it is represented by its own “symbol.” The symbol used to represent the speed of light is: c

19. 18. The process of making light with heat is called:
incandescence.

20. 19. If light bounces off the surface of a material, the change in direction is called: reflection.

21. 20. Which of the following colors of light has the highest energy?
a. Red c. Blue
b. Yellow d. Violet

22. 21. Most of the objects that we see are visible to us because they ____ light.
reflect

23. 22. The additive primary colors are:
red, green, and blue.

24. 23. The use of fluorescent lights is more economical than incandescent bulbs because fluorescent bulbs:
produce more heat than light.
emit four times more light from the same amount of electricity.
emit light from a hot, wire filament.
can be used for hatching baby chicks as well as for lighting.

25. 24. Light shining through a bottle of water is often bent
24. Light shining through a bottle of water is often bent. This change in direction is called: refraction.

26. 25. Photoreceptors commonly called cone cells respond to:
red, blue, and green.

27. 26. Which light ray will be bent more, one moving from diamond (n = 2
26. Which light ray will be bent more, one moving from diamond (n = 2.42) to water (n = 1.33), or a ray moving from sapphire (n = 1.77) to air (n = )?
Diamond to water, greater change in n.

28. 27. Below is a list of 4 materials and their corresponding index of refraction. In which material is light moving the slowest?
Cubic Zirconia, highest n