02.43: A light ray is incident normal to a thin layer of glass.y;6ggb7v c1 m.d7bk it Given the figure, what is the minimum thickness of the glav;ytb6m1i g7.ckbd7g ss that gives the reflected light an orangish color ( $\lambda_{air}$= 600 nm) ?

  05.43: Light is incident normal to a thin layer of soadh;p+:kvk8h tf g6o8j p. Given the figure, what is the mino8pkkjf8h6 vd+; tgh:imum thickness of the soap film that gives the soap a bluish color ($\lambda$ = 500 nm)?

  15.38: A thin film of alcohol 9u z8b-aqu x3odl9z f.($n_{alcohol}$= 1.35) lies on a flat glass surface ($n_{alcohol}$ = 1.60). When light of wavelength 540 nm is incident normal to the alcohol surface from air, the light is strongly reflected, but when light of wavelength 432 nm is incident normal to the surface from air, the reflected light is minimized. Which one of the following choices could represent the thickness t of the alcohol film?