A soap film of thickness 0.0011 mm appears dark when seen by reflected light of wavelength
Channel: Doubtnut
Date: 2020-08-30

A soap film of thickness 0.0011 mm appears dark when seen by reflected light of wavelength `5800Å`. What is the refractive index of soap solution if it is between 1.2 and 1.5. `[mu = 1.318]`