Reflecting telescopes Animation Play

Reflection Class activity Play

Reflection and refraction of light Class activity Play

Reflection and refraction of light Whiteboard presentation Play

Reflection of light Student activity Play

Reflection of light Class activity Play

Reflection of light Whiteboard exercise Play

Reflection of light Whiteboard presentation Play

Reflection of light at a smooth surface Animation Play

Reflectors Student activity Play

Reflectors Whiteboard exercise Play

Reflectors Slideshow Play

Refraction Class activity Play

Refraction of light Student activity Play

Refraction of light Whiteboard presentation Play

Refraction of light Class activity Play

Refraction of light Student activity Play

Regulation of the amount of light entering the eye Simulation Play

Regulation of the amount of light entering the eye Student activity Play

Relativistic momentum Whiteboard exercise Play

Relativistic momentum Student activity Play

Research into photosynthesis Student activity Play

Research into photosynthesis - conclusions Illustration Play

Resolution of optical devices Student activity Play

Resolution of optical devices Animation Play