A layer of oil, with a refractive index of 1.40798, exactly 1 mm thick, floats on water. Light of vacuum wavelength 632.800 nm,emitted by a stabilized He-Ne laser, is reflected at normal incidence by the oil.Question 11 ptsThe index of refraction of the oil varies slightly with the vacuum wavelength of the light. Find this alteredwavelength in nm:Question 21 ptsHow many wavelengths are contained in the light wave passing back and forth through the oil? (Hint: thereflected wave is shifted by X/2.) Please enter your answer as a whole number.Question 31 ptsDoes the light reflected from the two surfaces of the oil interfere constructively or destructively?DestructivelyO Constructively

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Answered: A layer of oil, with a refractive index…

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