Question

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 use
(C) the refreactive 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.
A. (A) and (D)
B. (B)and (D)
C. (A)and (C)
D. (B) and (C)

Answer 1

Correct Answer - B
for tyndall effect:
(1) refractive indcies of dispersed phase and disersion medium should be significantly different.
2. The diameter of dispersed of dispersed paticle should not differ much than we wavelength of light greatly in magnitude