Daylight gets reflected from a freestanding soap film andappears reddish (wavelength = 660 nm) when observed from adirection perpendicular to the film surface. Assume a refractiveindex of n = 1.33.
(a) What are the two smallest possible thicknesses of the soapfilm which fit to your observation?
(b) Which typical wavelength and related color do you observe whenwatching the film from an angle of 50° (relative to the surfacenormal) using the smallest possible thickness of the film from(a)?
