Reflection+&+Refraction+Facts

Copy, fill in or complete the numbered items. Don't copy numbers 5,6, 14, & 15. For these numbers do the sketching as directed.

Objectives: 7.6 Students will know: c. Light will travel in straight lines if the medium in travels through does not change d. How simple lenses magnify..... e. That white light is a mixture of many wavelengths (colors) f. Light can be reflected, refracted, transmitted, and absorbed by matter g. The angle of reflection of a light beam is equal to the angle of incidence

Answers can be found in the textbook on pages 53-60 by scanning the bold and highlighted text.

A prism can be used to show both reflection and refraction.
 * __ Reflection and Refraction __**

1. Reflection is... 2. Refraction is...

Reflection can be observed by having sunlight enter the flat side of a prism. The two angled sides away from the sun will reflect light. Light doesn't pass through the prism, but is reflected off in two directions. The sunlight entering the prism follows the “law of reflection” when reflecting off the two inside angled surfaces. Since the sunlight hitting the prism is reflected, the transparent prism has a shadow.



3. The law of reflection states that... 4. A ...... material transmits most of the light that strikes it. (textbook page 47)

5. Reflection a. Sketch a prism with sunlight entering one of the flat sides. Have each side of the prism about one finger length long. b. Show rays of light reflecting off the inside of the two sides away from the sun. c. Apply the law of reflection to determine the direction of the light being reflected. d. Label the angle of incident and angle of reflection with a letter. e. Label how the two angles should be equal.

6. Refraction a. Sketch a prism showing the visible spectrum created by sunlight hitting it. b. Show that red light is refracted the least and violet light is refracted the most. c. Label an arrow representing each color of light.

__ Refraction and Lenses __ 7. A ...... is thicker in the center than at the edges. 8. A ...... is thinner in the center than at the edges. 9. Parallel light rays converge after passing through a ...... lens. 10. Parallel light rays diverge after passing through a ...... lens. 11. Objects that are close to a ...... lens appear larger. 12. Objects that are far from a ...... lens appear upside down. 13. Objects seen through a ...... lens always appear smaller.

14. Converging and Diverging a. Sketch a lens causing parallel light rays to converge. Label the type of lens. b. Sketch a lens causing parallel light rays to diverge. Label the type of lens.



15. Sketch the bottom picture on page 59 showing how a convex lens magnifies an object. Note that the solid lines are how light travels. Note that the broken lines are how the object appears through the lens.

16. Sketch the picture on page 60 showing how a concave lens makes things look smaller.