Mirrors and Images


What is it that lets us see objects? Some objects, such as the sun, give off their own light. Most objects, however, do not. These objects must reflect light in order to be seen.

Required Materials


  • Science notebook
  • A pencil or some other object, such as a coin or paper clip
  • 2 four inch by six inch mirrors
  • Masking tape
  • Paper
  • Protractor

Activity Directions


  1. Work with a partner. Take two mirrors and place them together with the shiny sides facing one another. Tape them along the side to form a hinged door. The mirrors should be able to open freely like a book.
  2. Take a piece of paper or cardboard. Using a protractor, measure and mark angles (by drawing a line) of 180 degrees, 90 degrees, 60 degrees, 45 degrees, 36 degrees, 30 degrees, and 20 degrees.
  3. Place the hinged mirrors at each of these angles and put an object (it could be a coin, a pencil, an eraser, or some other item you may have at your desk) between them as close to the mirrors as possible.
  4. Count the number of images you see and record your observations in your science notebook.
  5. When you are finished, answer the following questions in your science notebook:
  6. What happened to the number of images you saw as you changed the angle from 60 to 45 degrees between the mirrors?
  7. What happened to the number of images you saw as you changed the angle from 30 degrees to 60 degrees?
  8. Can you now make a statement about how the angle between the mirrors determines how many images will be produced?
  9. Compare your findings with the findings of other groups. Is the information the same?
  10. If not, then what do you think might be the reason for them being different?