Huygen’s Principle

The surface of sphere with source as center and distance travelled by light wave as radius where each wave arrives simultaneously is called _____ .

A Wavefront is defined as the locus of points that are in the same phase.

What is the wave surface of light?

What is wave normal and wave front?

A light wave can travel

What is the normal of a light wave?

Assertion: When a plane wave passes through a thin prism, the emerging wavefront gets titled.
Reason: Speed of light is less in glass than in air.

A wavefront is defined as$:$

A light beam travelling along the $X$-axis with planar wavefront is incident on a medium of thickness, $t$. In the region, where light is falling the refractive index can be taken to be varying such that $\left(\frac{dn}{dy}\right)>0$. The light beam on the other side of the medium will emerge

Which of the following phenomenon cannot be explained by the Huygens' wave theory?

Ray is the locus of points in the light wave’ having the same phase of oscillation at any instant.

Two sources of monochromatic light are said to be coherent, if light waves produced by them have the same

In Huygen's principle, secondary wavefront at any later time is given by______envelope of secondary wavelets at that time.

The Huygen's wave theory is failed to explain the photoelectric effect because:

The phenomenon of light that can be explained using Huygen's theory of light is/are:

A monochromatic plane wave of speed c and wavelength $\lambda$ is diffracted at a small aperture. The diagram illustrates successive wavefronts (vibrating in the same phase). After what time will some portion of the wavefront $XY$ reach $P$?

Spherical wavefronts shown in figure, strike a plane mirror. Reflected wavefronts will be as shown in

Light waves travel in vacuum along the $x$-axis. Which of the following may represent the wavefront?

The figure shows a surface$XY$ separating two transparent media. Medium $I$ and medium $II$. The lines $ab$ and $cd$ represent wave fronts of a light wave travelling in medium $I$ and incident on $XY$. The lines $ef$and $gh$ represent wavefronts of the light wave in medium $2$ after refraction.

Figure shows plane waves refracted from air to water using Huygens' principle and $a$, $b$, $c$, $d$, $e$ are lengths on the diagram. The refractive index of water with respect to air is in the ratio