Physics » Light


Key Words

Convex lens - bluges outwards bringing light rays together (converge).

Concave lens - caves inwards causing light rays to spread out (diverge).

Axis - a line passing through the middle of the lens.

Real image - the light from an object comes together to form an image on a 'screen'.

Virtual image - rays diverge to make the object appear to be coming from a completely different place.

Ray Diagram - shows the path a ray travels in. The line is always straight.

Magnifying glass - creates a magnified virtual image.

Opaque - objects that do not transmit light. They absorb some wavelengths and reflect others.

Transparent/translucent - transmit light. Some wavelengths pass through.

Colour filters - only let through particular wavelengths.


Also see Waves, Electromagnetic Waves

Refraction of Light

Watch the video and have a go at writing out the steps of the practical.

Note paper for practical

Revision Tips

Find out what kind of learner you are and the best revision techniques for you.
Visit our Revision Tips page for more.