Which of the following phenomena cannot be explained by Huygens' principle?

By Huygen's wave theory of light,we cannot explain the phenomenon of

Huygens' theory of secondary waves can be used to find:

Explain the refraction of a plane wave from a denser to a rarer medium using Huygens' principle.

Select the correct option regarding the history and nature of light.

$A$ plane wavefront is incident on a water surface at an angle of incidence $60^{\circ}$. It then gets refracted at an angle of $45^{\circ}$. The ratio of the width of the incident wavefront to that of the refracted wavefront is $\left[\sin \frac{\pi}{4}=\cos \frac{\pi}{4}=\frac{1}{\sqrt{2}}, \sin 60^{\circ}=\frac{\sqrt{3}}{2}, \cos 60^{\circ}=\frac{1}{2}\right]$