Q3b. Fringes are observed due to monochromatic light in a Michelson interferometer. When the movable mirror is translated by 0.07 mm, a shift of 300 fringes is observed. What is the wavelength of the light? What displacement of the fringe system takes place when a flake of glass of index 1.51 and 0.004 mm thickness is placed in one arm of the interferometer? (Assume that the light beam is normal to the glass surface.)

Q3b. Fringes are observed due to monochromatic light in a Michelson interferometer. When the movable mirror is translated by 0.07 mm, a shift of 300 fringes is observed. What is the wavelength of the light? What displacement of the fringe system takes place when a flake of glass of index 1.51 and 0.004 mm thickness is placed in one arm of the interferometer? (Assume that the light beam is normal to the glass surface.)

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter3: Interference

Section: Chapter Questions

Problem 88AP: A 65-fringe shift results in a Michelson interferometer when a 42.0-µm film made of an unknown...

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A 5.08-cm-long rectangular glass chamber is inserted into one arm of a Michelson interferometer using a 633-nm light source. This chamber is initially filled with air (n=1.000293) at standard atmospheric pressure but the air is gradually pumped out using a vacuum pump until a near perfect vacuum is achieved. How many fringes are observed moving by during the transition?
A 65-fringe shift results in a Michelson interferometer when a 42.0-µm film made of an unknown material is placed in one arm. The light source has wavelength 632.9 nm. Identify the material using the indices of refraction found in Table 1.1.
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If mirror M2 in a Michelson interferometer is moved through 0.233 mm, a shift of 792 bright fringes occurs.What is the wavelength of the light producing the fringe pattern?
A thin film with index of refraction n = 1.24 is placed in one arm of a Michelson interferometer, perpendicular to the optical path. If this causes a shift of 9.0 bright fringes of the pattern produced by light of wavelength 679 nm, what is the film thickness?