Protostar Animation Play

Pulsars Student activity Play

Pulsars Animation Play

Pythagorean theorem in 3-dimensional space Whiteboard exercise Play

Pythagorean theorem in 3-dimensional space Student activity Play

Radio waves Student activity Play

Reactions occurring on the surface of a solid catalyst Whiteboard exercise Play

Reactions occurring on the surface of a solid catalyst Student activity Play

Reading out the position from a plan Student activity Play

Red giants Student activity Play

Red giants Animation Play

Reflecting telescopes Student activity Play

Reflecting telescopes Animation Play

Reflection of light Student activity Play

Reflection of light Whiteboard exercise Play

Reflection of light at a smooth surface Animation Play

Reflection of plane waves Animation Play

Reflection of plane waves Whiteboard exercise Play

Reflection of plane waves Student activity Play

Reflectors Student activity Play

Refraction Class activity Play

Refraction of plane waves Student activity Play

Refraction of plane waves Simulation Play

Refraction of plane waves Animation Play

Refraction of plane waves Whiteboard exercise Play