perpendicular to the direction of propagation of light.
parallel to the direction of propagation of light.
without any specific orientation with direction of propagation of light.
which has nothing to do with intensity of light.
Solution
- Wavefront: The locus of all particles in a medium, vibrating in the same phase/constant phase is called waveFront.
- The direction of propagation of light (ray of light) is perpendicular to the waveFront.
- Everv point on the qiven 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.
.
.