Consider the oil slick you see when a thin layer of oil sits on top of water. If you wanted to find which colors are reflected strongly for a given thickness of oil, which of the following equations would you use? Assume normal incidence. (noil = 1.47, nwater = 1.33, nair = 1.00) (a) d * sin() = m (b) d * sin() = (m + 1/2) (c) n1 * sin(1) = n2 * sin(2) (d) 2t = m (e) 2t = (m + )