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