*59. (III) One of the beams of an interferometer (Fig. 24–61)passes through a small evacuated glass container 1.155 cmdeep. When a gas is allowed to slowly fill the container,a total of 158 dark fringes are counted to move past areference line. The light used has a wavelength of 632.8 nm.Calculate the index of refraction of the gas at its finaldensity, assuming that the interferometer is in vacuum.To mirror M1Glass containerSource-FIGURE 24-61Ms1.155 cmМстProblem 59.

Given data: The depth is x=1.155 cm. The wavelength is λ=632.8 nm. The number of dark fringes is…

Answered: *59. (III) One of the beams of an…

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