Terms (2'28")

Basic (8'30")

Snell's Law 1 (10'25")

Colour (13'08")

Terms (2'28")

Optically less to more dense (10'16")

Optically more to less dense (7'16")

Summary (5'56")

Snell's Law 2 (9'02")

Terms (7'42")

Investigation (9'35")