Lines and angles Whiteboard presentation Play

Lines, rays and segments Student activity Play

Lines, rays and segments Whiteboard exercise Play

Measuring angles of reflection Simulation Play

Pairs of isomers Whiteboard exercise Play

Periscopes Student activity Play

Permeability and absorption of X-rays Slideshow Play

Permeability and absorption of X-rays Student activity Play

Permeability and absorption of X-rays Whiteboard exercise Play

Polarisation by reflection Whiteboard exercise Play

Polarisation by reflection Student activity Play

Polarisation by refraction Student activity Play

Polarisation by refraction Whiteboard exercise Play

Production and loss of heat Student activity Play

Production and loss of heat Slideshow Play

Radiation Animation Play

Radioactive decay Student activity Play

Radioactivity Student activity Play

Ray box Illustration Play

Real and apparent positions Simulation Play

Recording an infra-red spectrum Student activity Play

Recording an infra-red spectrum Whiteboard exercise Play

Reflecting telescope Student activity Play

Reflecting telescopes Student activity Play

Reflecting telescopes Animation Play