Spark image

Total internal reflection

To start the animation click on either the left or right 30o point of the protractor below the semicircular glass block to position the raybox.

To run the interactive experiment click on a position on the protractor to rotate the raybox and so change the angle of incidence of the light ray.

(Note: the animation may be used to calculate the refractive index of the glass)

© Keith Gibbs and John Bourne 2018