Refraction & total internal reflection
Steer a light ray across a boundary and find the critical angle.
Live calculation
Experiment setup
Examples: air ≈ 1.000, water ≈ 1.333, glass ≈ 1.500.
°
Drag in the upper half of the diagram to steer the incident ray.
nm
Used to compare wavelength in each medium. Indices remain fixed.
Results update as you change the setup. Your notebook and view zoom are kept.