A plate Student activity Play

A plate Animation Play

A plate Simulation Play

A plate Whiteboard exercise Play

Colour Whiteboard presentation Play

Colour Class activity Play

Critical angle Student activity Play

Density and the speed of light Student activity Play

Density of transparent materials Slideshow Play

Derivation of the formula Animation Play

Examples of refraction Student activity Play

Fermat's Principle Student activity Play

Fermat's Principle Simulation Play

Focal point and focal length Animation Play

Focal point of a concave mirror Student activity Play

How a periscope works Slideshow Play

Incidence of polio around the world Illustration Play

Measuring angles of reflection Simulation Play

On what does wave refraction depend? Whiteboard exercise Play

On what does wave refraction depend? Student activity Play

Periscopes Student activity Play

Real and apparent positions Simulation Play

Reflection Student activity Play

Reflection and refraction of waves Class activity Play

Reflection and refraction of waves Class activity Play