The UC Davis physicist measures the thickness of a layer of a benzene withnb= 1.50 by shiningmonochromatic light onto the film and varying the wavelength of the light (the film is in the air withn= 1). She finds that the light of wavelength 635 nm is reflected most strongly from the film. a) What is the minimum thickness of the film?b) What would be the wavelength of the most reflected visible light if the same layer was placed onthe surface of water withnw= 1.3 while the laser still shines from the air.