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 hole in a piece of paper Animation Play

A lens Whiteboard presentation Play

A lens Class activity Play

A magnifying glass Animation Play

A magnifying glass Student activity Play

A microscope Whiteboard exercise Play

A microscope Animation Play

A microscope Student activity Play

A mirror and a light bulb Student activity Play

A refracting telescope Student activity Play

A refracting telescope Whiteboard exercise Play

A spoon in a glass of water Animation Play

Aberration Animation Play

An image formed by a concave mirror Animation Play

An image formed by a converging lens Animation Play

An object brought closer to the focal point Animation Play

An object brought closer to the mirror Animation Play

Car headlights Animation Play

Characteristic rays Animation Play

Concave mirror, f < x ≤ 2f Whiteboard exercise Play