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MICHELSON’S INTERFEROMETER - NISER

Last updated in Dec 2017 NISER Page 1 MICHELSON S INTERFEROMETER Objectives: 1. Alignment of Michelson s INTERFEROMETER using He-Ne laser to observe concentric circular fringes 2. Measurement of the wavelength of He-Ne Laser and Na lamp using circular fringes 3. Study of fringes of equal inclination and equal thickness using Na lamp Introduction The instruments based upon the principle of interference are called interferometers. These are basic optical tools used to precisely measure wavelength, distance, index of refraction, and temporal coherence of optical beams etc.

semi-silvered such that the light from a source is equally reflected and E Fig. 1 : Construction of Michelson’s Interferometer. ... (for laser) or by naked eye (Na lamp) at E. Usually one of the mirrors is mounted on a translation stage so that it can be moved back and forth to observe the change in fringes. Optical path

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