1. Tardigrade
  2. Question
  3. Chemistry
  4. The Tyndall effect is observed only when following conditions are satisfied (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

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The Tyndall effect is observed only when following conditions are satisfied
(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

JEE MainJEE Main 2017Surface Chemistry

Solution:

The Tyndall effect is due to the fact that colloidal particles scatter light in all directions in space. This scattering of light illuminates the path of the beam in the colloidal dispersion. The bright cone of the light is called Tyndall cone. We can conclude that the Tyndall effect is observed when refractive indices dispersed phase and dispersion medium are different and dispersed particles have a diameter much smaller than the wavelength of light used.