ENGLISH

TB Physical Optics & Lasers 2.1 | Pages-296 | Code-776 | Edition-7th | Concepts + Theorems/Derivations + Solved Numericals + Practice Exercises | Text Book (Physics 13)

By Dr. R.K. Agarwal

Book information

ASIN
B099P3PK8Y
Language
english
Format
PDF
Filesize
3 MB (3587244 bytes)
Pages
\282
Library
SoftArchive
Time added
2023-07-15 13:50:41

Description

SYLLABUS- PHYSICAL OPTICS & LASERS, UNIT-I Interference of a light: The principle of superposition, two-slit interference, coherence requirement for the sources, optical path retardations, lateral shift of fringes, Rayleigh refractometer and other applications. Localised fringes; thin films, applications for precision measurements for displacements. Haidinger fringes: Fringes of equal inclination. Michelson interferometer, its application for precision determination of wavelength, wavelength difference and the width of spectral lines. Twymann Green interferometer and its uses. Iriensity distribution in multiple beam interference, Tolansky fringes, Fabry-Perrot interferometer and etalon. UNIT –II Fresnel diffraction: Fresnel half-period zones, plates, straight edge, rectilinear propagation. Fraunhoffer diffraction: Diffraction at a slit, half-period zones, phasor diagram and integral calculus methods, the intensity distribution, diffraction at a circular aperture and a circular disc, resolution of images, Rayleigh criterion, resolving power of telescope and microscopic systems, outline of phase contrast microscopy. Diffraction gratings: Diffraction at N parallel slits, intensity distribution, plane diffraction grating, reflection grating and blazed gratings. Concave grating and different mountings. Resolving power of a grating and comparison with resolving powers of prism and of a Fabry-Perrot etalon. UNIT - III Polarization, Double refraction in uniaxial crystals, Nicol prism, polaroids and retardation plates, Babinet’s compensator. Analysis of polarised light. Optical activity and Fresnel’s explanation, Half shade and Biquartz polarirneters. Matrix representation of plane polarized waves, matrices for polarizers, retardation plates and rotators, Application to simple systems. UNIT-IV Laser system: Purity of a special line, coherence length and coherence time, spatial coherence of a source, Einstein’s A and B coefficients, spontaneous and induced emissions, conditions for laser action, population inversion. Application of Lasers: Pulsed lasers and tunable lasers, spatial coherence and directionality, estimates of beam intensity; temporal coherence and spectral energy density.

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