Water Bending Light

What You Need:

  • Straw
  • Glass of water

Instructions:

  1. Place the straw in the glass of water.
  2. Watch how the straw appears to bend when it is inside the water.
  3. Lift the straw out, and notice it is still straight!

Why?

Light rays change direction when they enter the water, so the straw appears to bend when you look at it through water.