Understanding Light and Color Interactions

1. Light and Color Review

2. 1. Waxed paper and etched glass are • Transparent • Opaque • Translucent • Absorption

3. 2. When light is not reflected at all • Opaque • Reflection • Refraction • Absorption

4. 3. A material that does not allow any light to pass • Transparent • Opaque • Translucent • Absorption

5. 4. When you look at grass why does it look green? • Because green is reflected by the grass • Because green is a primary color • Because green is absorbed into the grass • Because green is a color in the spectrum

6. 5. A material that allows some light to pass • Transparent • Opaque • Translucent • Absorption

7. 6. When light is bounced off an object • Opaque • Reflection • Refraction • Absorption

8. 7. When light is bent by an object • Opaque • Reflection • Refraction • Absorption

9. 8. A material that allows all light to pass • Transparent • Opaque • Translucent • Absorption

10. 9. A wooden table, a concrete wall, and a book are all • Transparent • Opaque • Translucent • Absorption

11. 10a. A window, air, Mr. Marlow’s glasses are… • Transparent • Opaque • Translucent • Absorption

12. 10b. What do transparent materials allow? • Light to pass through with almost no disturbance • Light to be completely blocked • Light to be partially blocked • All of the above

13. 11. Which list of examples contains a translucent and an opaque object? • Eyeglass lenses and a pair of socks • A piece of waxed paper and a cardboard box • An overhead transparency and a crayon • A window and a baseball

14. Mirror Mirror Mirror Mirror 12. Which of the following models shows the path the light ray would take when bounced off of a mirror? A B C D

15. 13. Which model below shows how light travels through a convex lens? Explain your answer.

16. 14. Explain what happens to light when it enters a prism.

17. 15. What are the three primary colors of light? (3 pts)

18. 16. In the diagram below, the straw appears to be bent and separated, but the straw is normal (neither broken nor cut apart).Is this due to reflection or refraction? Explain your answer.

19. 17. When you look at an object through a concave lens, how does the image of the object change?

20. 18. Besides visible light, name two types of waves found on the electromagnetic spectrum. Then describe how each type of wave affects human life.

21. 19. When white light hits the green chalkboard, what happens to the red, green, and blue light that came from the white light?

22. 14. When light hits a prism, it refracts separating the light into the visible spectrum of light, ROYGBIV. 15. Red, green, and blue Answer Slide • 7. C • 8. A • 9. B • 10a. A • 10b. A • 11. B • 12. C 16. The straw appears to bend upward because light rays from the lower part of the straw change direction as they go from water into air. The bending of light rays as they pass from one substance into another is called refraction. 17. The image appears smaller, but always right side up. 18. X rays – show bones, Gamma radiation kills cancer cells, microwaves heat food, radio waves give us music, etc. 19. The green light is reflected while the red, orange, blue, indigo and violet are absorbed. 1. C 2. D 3. B 4. A 5. C 6. B 13. Illustration B shows how light travels through a convex lens. Convex lenses form images by converging light rays together, not scattering them apart.