Radio waves and microwaves Student activity Play

Radioactivity 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

Red giants Animation Play

Red giants Student activity Play

Reflecting telescopes Student activity Play

Reflecting telescopes Animation Play

Reflection and refraction of waves Class activity Play

Reflection and refraction of waves Whiteboard presentation Play

Reflection and refraction of waves Class activity Play

Reflection and refraction of waves Whiteboard presentation Play

Reflection of a wave Whiteboard exercise Play

Reflection of a wave Animation Play

Reflection of a wave Student activity 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 Student activity Play

Reflection of plane waves Whiteboard exercise Play

Refraction Class activity Play

Refraction of plane waves Student activity Play

Refraction of plane waves Animation Play

Relationship between the force of friction and the roughness of a surface Animation Play