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igcse physics notesprinted 92 · PDF 92
124 pagesrevision 46936
printed 92 · PDF 92
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Diffraction of Waves:
When Waves pass through a wide gap or a narrow gap then its wavefronts
change their shape as shown in the above diagram. When the gap width is
larger than the wavelength, the wave passes through the gap and does not
spread out much on the other side. When the gap size is smaller than the
wavelength or equal to wavelength, more diffraction occurs and the waves
spread out greatly – the wavefronts are almost semicircular.