CBSE NOTES CLASS 12 PHYSICS
CHAPTER 10 WAVE OPTICS
A wave front is defined as the continuous locus of all the particles of a medium, which are vibrating in the same phase. It can be defined as a surface of constant phases.
- Spherical wave front: It is wave front created by a point source. The locus of all the points which are vibrating in same phase lies on the surface of the sphere, of which at the centre, the point source is situated
- Cylindrical wave front: When the source of light is linear in shape then the locus of all the points which are equidistant from the linear source lie on a cylinder and the wave front formed is called cylindrical wave front.
- Plane wave front: It is small part of a big spherical or cylindrical wave front of which, the source of light is at a large distance from the wave front.