Reflection of light, spherical mirrors, mirror formula, lateral and longitudinal magnification, refraction of light, refractive index, its relation with velocity of light (formula only) total internal reflection and its applications, optical fibre, Refraction at spherical surfaces, thin lens formula, lens makers formula, magnification, power of lenses, combination of two thin lenses in contact, combination of a lens and a mirror, refraction and dispersion of light through prism; Scattering of light: blue colour of sky and reddish appearance of sun at sunset and sunrise. Optical instruments: microscopes and telescopes (reflecting and refracting) and their magnifying powers.
Wave front, Huygen’s principle, reflection and refraction of plane wave at a plane surface using wavefronts, proof of laws of reflection and refraction using Huygen’s principle. Interference, Young’s double slit experiment and expression for fringe width, coherent sources, sustained interference of light, diffraction due to a single slit, width of a central maximum, resolving power of microscope and astronomical telescope (qualitative idea), polarization, plane polarized light, Brewster’s law, uses of plane polarized light and polaroids
12-optics.pdf