An oil tanker has collided with a smaller vessel, resulting in an oil spill in a large, calm-water bay of the ocean. You

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An oil tanker has collided with a smaller vessel, resulting in
an oil spill in a large, calm-water bay of the ocean. You are
investigating the environmental effects of the accident and need to
know the area of the spill. The tanker captain informs you that
19000 liters of oil have escaped and that the oil has an index of
refraction of n = 1.1. The index of refraction of the ocean water
is 1.33. From the deck of your ship you note that in the sunlight
the oil slick appears to be blue. A spectroscope confirms that the
dominant wavelength from the surface of the spill is 460 nm.
Assuming a uniform thickness, what is the largest total area of the
oil slick?