A layer of oil (left(n_{text {oil }}=1.48 ight) 0. 0100 mathrm{~mm}) thick is resting on a puddle

A layer of oil \(\left(n_{\text {oil }}=1.48\right) 0. 0100 \mathrm{~mm}\) thick is resting on a puddle of water \(\left(n_{\text {water }}=1.33\right)\). If white light is incident on the oil, what is the smallest angle from normal at which green light \((\lambda=510 \mathrm{~nm})\) is strongly reflected?