WAVE OPTICS | PHYSICS CBSE | CLASS 12 | NOTES OF THEORY | NCERT CHAPTER |

Wave Optics is a branch of physics in which we study about the behaviour of light as wave. Starting with some simple concept and just over viewing of chapter. This notes are handwritten by the best teacher of physics and based on NCERT. THE FULL CHAPTER NOTES ARE IN PDF BELOW 1. Wave Nature of Light: Huygen’s Theory There are some phenomena like interference, diffraction and polarisation which could not be explained by Newton’s corpuscular theory. These were explained by wave theory first proposed by Huygen. The assumptions of Huygen’s wave theory are: (i) A source sends waves in all possible directions. The locus of particles of a medium vibrating in the same phase is called a wavefront. For a point source, the wavefront is spherical; while for a line source the wavefront is cylindrical. A distant wavefront is plane. (ii) Each point of a wavefront acts as a source of secondary wavelets. The envelope of all wavelets at a given instant gives the position of a new wavefront. 2. Wavefront A wavefront is defined as the locus of all the particles which are vibrating in the same phase. The perpendicular line drawn at any point on the wavefront represents the direction of propagation of the wave at that point and is called the ‘ray’. Types of Wavefronts: The wavefronts can be of different shapes. In general, we experience three types of wavefronts. (i) Spherical Wavefront (ii) Cylindrical Wavefront: (iii) Plane Wavefront: Use of white light: When white light is used to illuminate the slit, we obtain an interference pattern consisting of a central white fringe having few coloured fringes on two sides and uniform illumination. Mains TOPICS : WAVEFRONT : DIFFRACTION (Diffraction due to a Single Slit ) : INTERFERENCE (Young’s Double Slit Experiment) : COHERENT AND INCOHERENT SOURCES Here below link given https://drive.google.com/file/d/1O-B0QTSPl3JtqsoN3HAVdYlXOqPKOEqM/view?usp=share_link OR DOWNLOAD THE NOTES OF PHYSICS WAVE OPTICS Thank you for visiting and this content will be help ful for all of you Keep sharing and comment our veiws..