11. What happens if two complementary colors are projected together at the correct intensities onto a white screen?

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1 PreAP Physics Review Chapter 14 & Name: Date: Period: _ Use the diagram to answer questions The diagram represents three overlapping circles of equally intense light of different pure colors. Assume that the circles are projected onto a white screen in an otherwise completely dark room. 1. What color if any would region A be? 2. What color would region B be? A Blue 3. What color would region C be? 4. What color would region D be? B E C 5. What color would region E be? Red D Green 6. What color types of light (primary additive or primary subtractive) are red, blue and green light? 7. What color type of light (primary additive or primary subtractive) would be in region B? 8. What color type of light (primary additive or primary subtractive) would be in region C? 9. What color type of light (primary additive or primary subtractive) would be in region D? 10. The color in region B is the complementary color to which color? 11. What happens if two complementary colors are projected together at the correct intensities onto a white screen? 12. The color in region C is complementary to which color? 13. The color in region D is complementary to which color? 14. Polarization confirms that light has characteristics yet photons behave like. 15. Visible light waves have wavelengths from about nm to about nm. 16. The shortest wavelengths of visible light are seen as light. 17. waves are the shortest electromagnetic waves. 18. waves cause damage to living tissue and are just short of those in the visible spectrum. 19. waves are the type of waves that are the majority of waves emitted by the sun. 20. Light travels at a constant in a vacuum. 21. The speed of light (and ALL EM WAVES) in a vacuum is approximately. 22. Polarization is evidence that light has characteristics of a wave. 23. What is the frequency of an electromagnetic wave if it has a wavelength of 1.0 km? 24. What is the frequency of highly energetic ultraviolet radiation that has a wavelength of 125 nm? 25. What are the 7 regions of the EM spectrum. Please list from lowest highest frequency.

2 26. What color do you see get when you mix blue and cyan ink? 27. What color do you get when you shine the following colors of light onto an opaque cyan shirt? a. Red b. Blue c. Green d. Magenta e. White f. Yellow 28. What is the frequency of red light, 700 nm? 29. What is the wavelength of FM radio waves of 88.5 MHz Review Chapter Use the following diagram to answer questions The diagram represents a light ray passing through two media. LOOK AT IT CAREFULLY! 1. Which labeled line represents the incident ray? 2. Which line represents the refracted ray? 3. Which line represents the boundary between two media? B A Medium 1 Light Ray E F C- BOUNDARY H Medium 2 4. Which line represents the normal? G Light Ray 5. Which labeled angle represents the angle of incidence? D 6. Which labeled angle represents the angle of refraction? 7. Which is the greater angle: the angle of incidence or the angle of refraction? 8. Which medium is more optically dense? How can you tell? 9. In which medium does the wave travel slower? How can you tell? 10. In which medium does light travel faster? How can you tell? 11. Compared to the speed of light in air, the speed of light in glass is. 12. If a light ray travels from a more optically dense substance to a less optically dense substance, the light ray will (speed up/slow down) (circle one).

3 13. If a light ray travels from a more optically dense substance to a less optically dense substance, the light ray will (bend toward the normal/bend away from the normal) (circle one). 14. A medium that s more optically dense will allow light to travel (slower/faster) (circle one). 19. What kinds of images (real/virtual/both) can convex lenses produce? 20. What kinds of images (real/virtual/both) can concave lenses produce? 23. The images produced by a concave lens are always (orientation). 24. A concave lens is in the center than at the edges. 25. Concave lenses refract light rays so that the rays. 26. The images produced by concave lenses are,, and. 38. A 3.0 cm tall object is placed 8.0 cm in front of a concave lens. The focal length of the lens is 5.0 cm. Draw a ray diagram to locate the image. Label f and 2f. Your drawing MUST be to scale and use a ruler. a. Describe the image (three descriptors). b. Calculate the image distance. c. Calculate the magnification.

4 39. A 1.50 cm tall object is placed 7.0 cm in front of a convex lens with a focal length of 4.0 cm. Draw a ray diagram to locate the image.. Label f and 2f. Your drawing MUST be to scale and use a ruler. a. Describe the image (three descriptors). b. Calculate the image distance. c. Calculate the magnification. 40. Yellow light (wavelength = 580 nm) enters diamond (n = 2.4) from air at an angle of 30. a. Calculate the angle of refraction. b. Calculate the speed of light in the diamond. c. Calculate the wavelength of light inside the diamond. 41. Light passes through water (v = 2.25 x 10 8 m/s) into glass (v = 2 x 10 8 m/s). Calculate the critical angle for the transition.

5 42. Identical rays of light enter three transparent blocks. They are composed of different materials, each more optically dense than air. Rank the blocks according to the speed of light in each, from highest speed to lowest speed. A B C 43. How do you know? 44. Identical rays of light in air are refracted upon entering tanks of three different transparent materials. Based on the speed of light in each material, rank them according to how much the light ray bends towards the normal, from most bending (closest to the normal) to least bending (farthest from the normal). water, v = 2.3X10 8 m/s alcohol, v = 2.1X10 8 m/s glass, v = 1.9X10 8 m/s 45. Explain your answer.