| Optics > Refraction > Index of Refraction | DCS# 6A40.30 |

| Pyrex 600 ml beaker | 101-01-C |
| Pyrex 100 ml beaker, no grads | 101-01-C |
| Johnson's baby oil | 202-21-C |
| black cloth for background | 202-21-B |
| video camera | 102-09-D |
Stick cloth to the board with magnets.
Other possible liquids include wesson
oil,
glycerine/water mix.
Or quartz or lucite in glycerine.
Variations:
Rest coin on submerged glass object so
it appears to be suspended in the liquid.
Half fill bottle with eyedropper and
pass
around.