Seeing Around Corners

Seeing Around Corners Photo Credit: Science NetLinks


Seeing around corners doesn’t sound possible, does it? Well, it is. See for yourself as you learn about periscopes, make one of your own, and try it out.


Go to the activity Up Periscope!

Scroll down to the blue shaded box "Wow! I Didn’t Know That" and read about where the word periscope comes from.

  • What other words do you know that include the Greek roots peri and scopus?

Scroll back up to the instructions for making a periscope. Read through them quickly to get a general idea of what you will do.

Examine the materials you will use to make your periscope and follow along as your teacher reads Steps 3–9. Then put your periscope together.

Continue using Up Periscope! Read Step 10 of the instructions to learn how to use your periscope.

Look at objects around the room through your periscope. Try looking at the page of a book or something else with writing on it.

Then have a classmate stand where you can't see him/her with just your eyes. Try to see your classmate with the periscope. Move around until you can see him/her clearly. Have your classmate stand in several different places out of your line of sight to test your periscope

Knowledge Check

Answer these questions on your Seeing Around Corners student sheet to show what you learned about periscopes:

  • How does a periscope let you see around corners and over and under things?
  • How does the periscope affect the size and shape of the objects you see?
  • How could you make a periscope that would let you see behind you? Hint: Look at the diagram of how a periscope works and think about where the light has to enter it.
  • What ways could periscopes be used in real life?
  • CHALLENGE QUESTION: Can you read writing through your periscope? Why or why not? Hint: Think about what writing looks like in a mirror.

This esheet is a part of the Seeing Around Corners lesson.

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