Question

Which of the following statement is applicable for Tyndall effect?

• A. The diameter of the dispersed particle is much smaller than the wavelength of the light used
• B. The diameter of the dispersed phase is much smaller than the wavelength of the light used
• C. The refractive indices of the dispersed phase and the dispersion medium must be same
• D. The refractive indices of the dispersed phase and the dispersion medium must differ greatly in magnitude

Answer 1

Answer: (D)

The refractive indices of the dispersed phase and the dispersion medium must differ greatly in magnitude

The scattering of light by colloidal particles is called Tyndall effect in which the refractive indices of the dispersed phase and the dispersion medium must differ greatly in magnitude.