KENTUCKY (9/19/17) Did you know you can change the direction of an arrow, just by using water?


  • Transparent Glass
  • Black Permanent Marker
  • Piece of Paper
  • Water


STEP 1:  Fill the transparent glass with water.

STEP 2:  Using the black permanent marker, draw a horizontal arrow on the piece of paper.   

STEP 3:  Place the piece of paper, with the horizontal arrow, behind the transparent glass, filled with water. Make sure the paper is touching the transparent glass of water and observe the horizontal arrow.   

STEP 4:  Move the piece of paper, with the horizontal arrow, away from the transparent glass of water and observe the horizontal arrow. What are the effects of placing the piece of paper, with the horizontal arrow behind the transparent glass of water?  


As you move the piece of paper, with the horizontal arrow, away from the transparent glass of water, the arrow appears to reverse. The light is refracted as it passes through the transparent glass, the water, then through the back of the transparent glass, and finally through the air to the paper with the horizontal arrow. This refraction causes the horizontal arrow to appear as if it is reversed.

Jason Lindsey – Hooked on Science

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