Index of Refraction: With the Blackboard or Whiteboard Optics
semicircle piece you can measure the index of refraction
of the lucite material directly with Snell's Law This will be a useful value
later if you plan to use the rectangular block for parallel deviation or the
prism for total internal reflection. Then you can predict and check results
from your measured value of n. See 0.1.3 and
Disappearing Object: A chunk
of glass or other transparent material is put in a beaker. Benzene or mineral
oil can be introduced into the beaker. The object will disappear when the index of
refraction of the fluid is the same as that of the object.
Reappearing Dice: An opaque
cylindrical container with dice inside is placed in front of the class so
that the dice are blocked from view. When water is added to the container,
refraction will make the dice visible to the class.