Big Idea: Waves carry information without causing a permanent change on the intervening medium. More info...
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The demonstration of refraction using a ripple tank is tricky, and it is a good idea to practise this.
Demonstration: Refraction at an air-water interface and total internal reflection.
Demonstration: Shows refraction is caused when plane waves change speed as a result of a change in the depth of water in a...
Why does the angle of incidence = the angle of reflection ? One answer explored earlier is an appeal to the rules about rays...
This episode starts from the phenomenon of refraction and moves on to Snell’s law.
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