A biconvex lens Animation Play

A change in speed during the passage to a different medium Whiteboard exercise Play

A converging image, x < f Student activity Play

A converging lens Animation Play

A converging lens Animation Play

A converging lens Animation Play

A hole in a piece of paper Animation Play

A lens Whiteboard presentation Play

A lens Class activity Play

A magnifying glass Student activity Play

A magnifying glass Animation Play

A magnifying glass Simulation Play

A magnifying glass Student activity Play

A magnifying glass Whiteboard exercise Play

A magnifying glass Whiteboard exercise Play

A microscope Student activity Play

A microscope Animation Play

A microscope Whiteboard exercise Play

A mirror and a light bulb Student activity Play

A mirror and a light bulb Animation Play

A photographic camera Simulation Play

A photographic camera Student activity Play

A refracting telescope Animation Play

A refracting telescope Whiteboard exercise Play

A refracting telescope Student activity Play