Big Idea: Waves carry information without causing a permanent change on the intervening medium. More info...
Class Practical: A diffraction pattern showing bands of colour produced from white light.
Class practical: A group of short, introductory experiments to investigate the behaviour of concave and convex lenses using...
Demonstration: Refraction at an air-water interface and total internal reflection.
Demonstration: This ripple tank experiment models the action of a diffraction grating.
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