suppose you mixed two chemicals in the lab until you could not tell the two apart. after some time passed, a white powder formed which would not dissolve, and settled on the bottom. the mixture was first then

a. heterogeneous, homogenous

b. homogenous, homogenous

c. homogenous, heterogeneous

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th