Question

Define wave front. state huygens principle and verify snell's law.

Answer 1

wavefront- a surface containing points affected in the same way by a wave at a given time.
huygens principle-every point on a wavefront may be considered a source of secondary spherical wavelets which spread out in the forward direction at the speed of light

Answer 2

Wave Front- It is defined as the surface over which the phase of the wave is constant.

• In a particular wavefront, at a given moment all the particles of the medium are undergoing the same motion.
• Two types of the wavefront are important.
• They are plane wavefront and spherical wavefront.

Huygens Principle - It is also known as the Huygens-Fresnel principle.

• It is a statement that all points of a wavefront of sound in a transmitting medium.
• It states that every point on a wavefront may be considered a source of secondary waves.

Snell's Law- It is defined as the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light of a given color and the given pair of media.