02.43: A light ray is incident normal to a bqnrpp l(- 1;dthin layer of glass. Given the figure, what is the minimum thickness of the glass that gives the re1ld pbnp-r (;qflected light an orangish color ( $\lambda_{air}$= 600 nm) ?

  05.43: Light is incident normal te s0cg)d0k-dp/ttp9a o a thin layer of soap. Given the figure, what is the minimum thickness of the soap film that gives the soap a bluish c dgt0/pt -kpdec0s9) aolor ($\lambda$ = 500 nm)?

  15.38: A thin film of alco ckjw 2h4*c0znhol ($n_{alcohol}$= 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?