Wavefront of a wave has direction with wave motion
Parallel
Perpendicular
Opposite
At an angle of $\theta$
(b)Direction of wave is perpendicular to the wavefront.
In the adjoining diagram, a wavefront $AB$, moving in air is incident on a plane glass surface $XY$. Its position $CD$ after refraction through a glass slab is shown also along with the normals drawn at $A$ and $D$. The refractive index of glass with respect to air ($\mu = 1$) will be equal to
The wave theory of light was given by
Which one of the following phenomena is not explained by Huygen's construction of wavefront
Huygen's principle is applicable to
Explain how to get a new wavefront in time $\pi $ using Huygen's principle for plane wavefront.
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