Index of refraction michelson interferometer pdf

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    Measuring the Refractive Index of a Gas In one arm of a Michelson interferometer, a glass chamber is placed with attachments for evacuating the inside and putting gases in it. The space inside the container is 2 cm wide. Initiall,ythe container is empt.y As gas is slowly let into the chamber, you observe that dark fringes move past a reference
    10. Michelson Interferometer Background Coherence Phase relationship Path difference Interference Virtual light source Refractive index Fresnel’s biprism Aim of the experiment (i) To determine the wavelength of the laser source by observing the fringe pattern obtained in the Michelson interferometer.
    The calculated value of the refractive index of air, ๐‘› ๐‘Ž๐‘–๐‘Ÿ was found to be 1.000296 ยฑ 0.000012, which is very close to the literary value (at normal pressure and temperature): ๐‘› ๐‘Ž๐‘–๐‘Ÿ = 1.000269. Michelson Interferometry Hassan Mirza Queen Mary University, Department of Physics Mile End Road, London, England, E1 4NS [2] Part 1
    Michelson Interferometer Lab Report Robert Clancy 04329741 November 9, 2005 Abstract In this experiment the famous Michelson interferometer and some 2.2 Dependence of the refractive index of air on pressure The interferometer was set up with the mercury lamp with the mercury green lter.
    In this experiment a Michelson interferometer will be used to observe white light interference fringes (ยง4.2), measure the wavelength of the output beam of a helium-neon laser (ยง4.3), and measure the index of refraction of air (ยง4.4). The Michelson interferometer that will be used is sketched in Fig.4.1, and a photograph appears in Fig.4.2.
    Photo Multiplier Figure 3. The apparatus used to measure the refractive index of a glass with known thickness using the Michelson interferometer. 4. The job of the photomultiplier was to detect the incoming photons and generate an electric voltage proportional to the number of photons. This voltage was monitored with an oscilloscope.
    determined the index of refraction in air by finding the optical path length in different pressures. The known value of 1.00029 according to NIST falls within the standard deviations of the calculated n = 1.00025 ยฑ 0.00004 [2]. I. INTRODUCTION The Michelson interferometer is an instrument that takes high precision measurements of
    Michelson interferometer: theory The Michelson interferometer employs a division of amplitude scheme. It can be used to carry out the following principal measurements: Width and fine structure of spectral lines. Lengths or displacements in terms of wavelengths of light. Refractive indices of transparent solids.
    The refractive index n of a substance varies as a function of temperature. A water-containing cell was placed in one leg of a Michelson interferometer, producing fringe shifts (laser interference patterns) on a screen as the water cooled. By counting the fringe shifts for each change in temperature of 1ยฐC, a set of values for could be created.
    Fig. 2 Formation of fringes by Michelson interferometer . The mirror M2 is here replaced by its virtual image M2′ formed by reflection in G. If M1 and M2 have been set vertical and perpendicular to one another, then M2′ is parallel to M1. Owing to the mirror action of G, we may now think the light source as being the observer and as forming two
    whose index of refraction is greater than that of air. I have used green and red to show the parentage of each beams. Figure 2: Assuming destructive interference at the detector, we use the phase shift rules to nd the relative phase for the beams headed towards the source. The boxed quantities represent the phase gained from re ections and
    whose index of refraction is greater than that of air. I have used green and red to show the parentage of each beams. Figure 2: Assuming destructive interference at the detector, we use the phase shift rules to nd the relative phase for the beams headed towards the source. The boxed quantities represent the phase gained from re ections and
    Michelson Interferometer Abstract A Michelson interferometer, constructed by the student, is used to measure the wavelength of He-Ne laser light and the index of refraction of a flat transparent sample. References Taylor, Zafiratos and Dubson, Modern Physics , second edition, Section 1.5. Pre-Lab Please do this section before coming to lab.

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