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Q.
Huygens principle of secondary wavelets may be used to
ManipalManipal 2009Wave Optics
Solution:
Huygens' principle states that every point on a wave front may be considered as a source of secondary waves. The word interference is used to describe the superposition of two waves, whereas diffraction is interference produced by several waves. By this principle we can find the exact position of the next ripple/wavefront that is to be produced.