IB Physics: Diffraction

Deriving the formula for single slit diffraction is probably one of the most difficult bits of the AHL material. The stumbling block is often that students don"t realise that this is an approximation. To make the geometry easier we take the light to be parallel even though it can"t be if the wavelets are going to converge. It is very important to explain clearly how the diagram is constructed as understanding the derivation...

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