JEE Main - Previous Year Papers JEE MAIN 2021 PAPER -11 Single Correct MCQ
Published on: August 12, 2026

Tyndall effect conditions

A
The diameter of the dispersed particles is much smaller than the wavelength of the light used
B
The refractive indices of the dispersed phase and the dispersion medium are same in magnitude
C
The radius of the dispersed particles is much smaller than the wavelength of the light used
D
The refractive indices of the dispersed phase and the dispersion medium is not differ greatly in magnitude

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The correct answer is:
A

Tyndall effect is observed only when the following two conditions are satisfied. (i) The diameter of the dispersed particles is not much smaller than the wavelength of the light used; and (ii) The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.

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