Optics > Geometric Optics > Refraction
DCS# 6A40.70
OPTICAL ILLUSION DUE TO REFRACTION
APPARATUS
thick walled-mug
202-21-E
calipers
101-09-E1
food coloring
101-14-D2
camera
202-09-D
tank of water
202-21-D
DESCRIPTION
The mug appears to be full to the outside surface of the glass, in spite of the thick walls. The thickness of the walls becomes apparent when the mug is viewed from above, or through water.
