A diode in a bike Student activity Play

How to illuminate a room? Slideshow Play

Intensity of screen illumination Animation Play

Inverse square proportion Student activity Play

LED diode (light-emitting diode) Student activity Play

LED diode (light-emitting diode) Animation Play

LED diode (light-emitting diode) Whiteboard exercise Play

Light emission in semiconductors Student activity Play

Light emission in semiconductors Whiteboard exercise Play

Photocell Whiteboard exercise Play

Photovoltaic cell Student activity Play

Pupil Student activity Play

Pupil Whiteboard exercise Play

Semiconductor laser Whiteboard exercise Play

Semiconductor laser Student activity Play

Semiconductor laser Slideshow Play

Sun Animation Play

The Purkinje effect Student activity Play

The Purkinje effect Animation Play

The Purkinje effect Whiteboard exercise Play

Transpiration and factors affecting its rate Student activity Play

Umbra and penumbra Student activity Play