A very thin oil film (noil=1.25) floats on water (nwater=1.33). What is the thinnest film that produces a strong reflection for green light with a wavelength of 500 nm? Which of the following equations should be used to find the minimum thickness t of the oil film that satisfies the conditions of the problem? Let λ be the wavelength of light in air and n the index of refraction of the thin filma. 2t=mλn(m=0,1,2,...) for constructive interference. b. 2t=(m+12)λn(m=0,1,2,...) for destructive interference. c. 2t=(m+12)λn(m=0,1,2,...) for constructive interference. d. 2t=mλn(m=0,1,2,...) for destructive interference.