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Refraction


Video Deomonstration Instructions

Popsicle Stick and Cup

  • Fill a glass with water.
  • Insert a straight object, such as a Popsicle stick or a straw, into the glass.

Lens Over Eyes

  • Obtain a lens. You can request a lens here.
  • Find a mirror or a friend and see how the lens changes the shape of your face!
  • Look at other objects too, such as your hands and feet.

Collimated Beam, Lens and Fish Tank

  • Obtain a flashlight, fish tank, milk or creamer, and a lens. You can request a lens here.
  • Fill the fish tank 2/3 full of water.
  • Add a few drops of milk or creamer into the water until it is slightly fogged.
  • Shine the flashlight into the side of the fish tank, approximately 8 inches away from the tank.
  • Place the lens in between the flashlight and the fish tank.
  • Move the lens back and forth and watch the light in the fish tank refract.
*This demonstration may be difficult to perform at home. Strong, collimated beams work best.

Laser and Fish Tank

  • Obtain a fish tank, milk or creamer, baby powder, and a laser.
  • Fill the fish tank 2/3 full of water.
  • Add a few drops of milk or creamer into the water until it is slightly fogged.
  • Squeeze the baby powder a few times on the side of the fish tank to create a slight fog.
  • Shine the laser into the side of the fish tank, at an angle, to see refraction occur.

Ray Box and Optic

  • Obtain a ray box, optic, and a 360° protractor. You can download and print a 360° protractor here.
  • Place the optic on the protractor, making sure that flat side of the optic is level at the 0° mark.
  • Move the ray box around the protractor, noting the angle of incidence and the angle of refraction.