Unit VI: Optics                  (Chapter 10 Wave Optics)

Wave optics: Wavefront and Huygens’ principle, reflection, and refraction of plane wave at a plane surface using wavefronts.Proof of laws of reflection and refraction using Huygens’ principle.Interference, Young’s double hole experiment and expression for fringe width, coherent sources, and sustained interference of light.Diffraction due to a single slit, width of central maximum.Resolving the power of microscopes and astronomical telescopes. Polarisation, plane polarised light; Brewster’s law, uses of plane polarised light and Polaroids.