To show and then play a movie, click on the arrow or the movie title/description. Repeat to hide it.

UL L3 Movie 1: Light beam entering water from air at different angles

UL L3 Movie 2: Light beam entering air from water at different angles

UL L3 Movie 3: Light beam in water hits surface with an angle of incidence greater than 50°

UL L3 Movie 4: Mystery of the Appearing Coin