I have a test tomorrow and I'm stuck on what to do with this question. If someone could help me I would greatly appreciate it. I'm completely lost on this: A thin layer of glass (n = 1.50) floats on a transparent liquid (n = 1.35). The glass is illuminated from above by light with a wavelength, in air, of 5.80 x 10^2 nm. Calculate the minimum thickness of the glass, in nanometres, other then zero, capable of producing destructive interference in the reflected light.