What are the dispersed phase and dispers...

What are the dispersed phase and dispersion medium in foam?

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Dispersed phase: air, Dispersion medium: liquid (water).

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The tyndall effect is observed only when following conditions are satisfies- (a) The diameter of the dispersed particles is much smaller than the wavelength of the light used. (b) The diameter of the dispersed particle is not much smaller than the wavelength of the light used. (c)The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude. (d) The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

The Tyndall effect is observed only when the conditions are satisfied (i) the diameter of dispersed particle is much smaller than the wavelength of the light used (ii) the diameter of the dispersed particle is not much smaller than the wavelength of the light used (iii) the refractive indices of the dispersed phase and the dispersion medium are almost similar in magnitude (iv) the refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude

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