Wave Behaviour Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Summary Test

Have you noticed how you can hear someone round a corner before you can see them. 
Why is this? 
Light has a very small wavelength, so only very small objects or gaps can effect its direction. 
The wall blocks the light and the person can't see round the corner. 
Sound waves bend round objects of a similar size to their wavelength. 
A wall has a similar size to the sound's wavelength. 
The effect is called diffraction.

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