List of top Physics Questions on huygens principle

According to Huygen’s wave theory of light, which one of the following statements is not correct?

In Huygens construction, the secondary wavelets move ________.

Huygen's principle does not use

Huygens’ wave theory of light cannot explain

Spherical wave fronts, emanating from a point source, strike a plane reflecting surface. What will happen to these wave fronts, immediately after reflection ?

A wave has velocity $v$ in medium $P$ and velocity $2v$ in medium $Q$. If the wave is incident in medium $P$ at an angle of $30^{\circ}$, then the angle of refraction will be

Sound waves in air cannot be polarized because

The wave theory of light was given by

A glass slab of thickness 4 cm contains same number of waves as 5 cm thickness of water, when both are traversed by the same monochromatic light. If the refractive index of water is 4/3, what is the refractive index of glass:

The $6563 \,?$ $H_\alpha$ line emitted by hydrogen in a star is found to be red-shifted by $15\,?$. The speed with which the star is receding from the earth is

Sound waves travel fastest in