Which one of the following phenomena is not e | vedclass

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(D) Huygens' principle is a geometric method used to determine the shape of a wavefront at any time $t'$ if its shape at time $t$ is known.Using this

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Origin of spectra

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(D) Huygens' principle is a geometric method used to determine the shape of a wavefront at any time $t'$ if its shape at time $t$ is known.Using this principle,one can successfully explain the laws of reflection,refraction,and the phenomenon of diffraction.However,Huygens' wave theory does not provide an explanation for the origin of spectra,which is related to the quantum nature of light and atomic energy levels.Therefore,the correct option is $D$.

Which one of the following phenomena is not explained by Huygen's construction of wavefront?

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