Question

Which of the following is/are based on the Tyndall effect?

• A. Tail of a comet
• B. Blue colour of the sky
• C. Deltas
• D. Coagulation

Answer 1

Answer: (A), (B)

The correct options are
A Tail of a comet
B Blue colour of the sky

Scattering of light by colloidal partciles is called as tyndall effect.

Tail of comets is seen as a Tyndall cone due to the scattering of light by the tiny solid particles left by the comet in its path.

Sky is blue due to scattering of light by air molecules which are smaller than the wavelength of visible light and this phenomenon is actually called as Rayleigh scattering instead of tyndall effect.