According to Huygen's principle, light is a form of

Explanation:

• Huygens principle: It states that each point on a wavefront is a source of wavelets, which spread forward with the same speed.
• Wavefront: A wavefront is a surface or a line on which the disturbance at every point has the same phase.
• Huygenes with his theory stated the wave phenomena of light.
• By this theory, reflection, refraction and diffraction can be understood.

Additional InformationHuygens principle Important Points

• Wavefront: The locus of all particles in a medium, vibrating in the same phase is called waveFront.
• The direction of propagation of light (ray of light) is perpendicular to the waveFront.
• Every point on the given wavefront acts as a source of a new disturbance called secondary wavelets which travel in all directions with the velocity of light in the medium.
• A surface touching these secondary wavelets tangentially in the forward direction at any instant gives the new wavefront at that instant. This is called a secondary wavefront.