refraction

aneat1

Refraction with Water

smoke on the water 1

laser refraction 1

laser refraction 2

total internal reflection

  • Refracted beam of light made visible with water, coffee creamer, and smoke.
  • Fill container half way with water. Mix in 1 or 2 pinches of non-dairy coffee creamer.
  • Use smoke maker (blue device in top photo) to fill container with smoke. Place lid on container to contain smoke.
  • Use laser pointer to create beam of light.

aneat1

Phantom Crystals

Phantom Crystals Demo Picture 2

index matching gel crystals 2

index matching gel crystals 1

  • Phantom Crystals are carbon-based polymers that absorb up to 300 times their weight in water. A fully saturated crystal in a glass of water is almost invisible, as light passes through it without being refracted. But when exposed to air, the water soaked crystals are clearly visible, because air’s index of refraction is very different from that of water.
  • Located in L01, section B-5

 

aneat1

Optical Fiber in Oil

 

Optical Fiber in Oil Demo Picture
Optical Fiber in Oil Demo Picture 2

Optical Fiber in Oil Demo Picture 3

Optical Fiver in Oil Demo Picture 4

  • Shine laser through bent optical fiber and total internal reflection is observed. Place optical fiber in tub of oil and laser is no longer internally reflected because index of refraction of oil is similar to that of optical fiber.
  • Oil and optical fiber located in L01, section B5. Red pasco
    laser located in L35, section A5. Ring stand in L35. Clamp in L35, section
    D1.
  • Bring paper towels for clean-up.

 

 

aneat1

Blackboard Optics

 

Blackboard Optics Demo Picture

Experiments Include

  • The laws of reflection
  • virtual image with a plane mirror, convex mirror, and a concave lens
  • focal length of concave and convex mirrors
  • focal length of planoconvex and planoconcave lenses
  • real image formed by a concave mirror
  • simple refraction
  • less dense to more dense medium
  • parallel displacement by a rectangular block
  • semicircular body
  • light incident at center if disc and at right angles to tangent
  • critical angle
  • total internal reflection
  • reversing prism.

Have 2 sets. New set uses magnetic attachments, old set uses suction.

  • Located in L01; section B6

 

aneat1

Kubic Bubbles

 

Kubic Bubbles Demo Picture

  • Build cubes, octahedrons, tetrahedrons and triangular prisms – then
    dip them in soapy glycerin mixture to produce surfaces of minimum energy.
  • Study surface tension and demonstrate light refraction.
  • Soap film surface contained by three dimensional framework will
    automatically arrange itself to have the smallest possible surface
    area. Soap films can be used to give visual answers to complex mathematical problems.
  • Located in L02, section D1. Soap solution located in L01,
    section B5.