When light passes through an emulsion, waves scatter at the oil and water interfaces giving the system a whitish appearance if light scatters equally.
but in case of Nano-sized emulsion, where particle diameter is below 100 nm, the system appears colorless or translucent. This is explained by the fact that light is only scattered by particles that exceed 1/4 of light wavelength. and in case of particles below 100 nm, visible light can penetrate the particle without any scattering( remembering that visible range starts from 390 nm).
Furthermore, emulsion appearance is not only a function of particle size, but also number of particles in a given system.
When light passes through an emulsion, waves scatter at the oil and water interfaces giving the system a whitish appearance if light scatters equally.
but in case of Nano-sized emulsion, where particle diameter is below 100 nm, the system appears colorless or translucent. This is explained by the fact that light is only scattered by particles that exceed 1/4 of light wavelength. and in case of particles below 100 nm, visible light can penetrate the particle without any scattering( remembering that visible range starts from 390 nm).
Furthermore, emulsion appearance is not only a function of particle size, but also number of particles in a given system.
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