Physics · Wave Optics
An experiment with a Michelson interferometer is performed in a vacuum using a laser of wavelength 650 nm. One of the beams of the interferometer passes through a small glass tube 1.3 cm long. After the tube is filled with a medium of refractive index μ, 800 dark fringes are counted moving past a reference line. The value of μ is:
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1.02
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