Question

Assertion(A) : The phenomenon of scattering of light by the colloidal particles gives rise to Tyndall effect. Reason (R) : The colour of the scattered light depends on the size of the scattering particles​

Answer 1

Answer:

b) Both A and R are true, but R is not the correct explanation of the assertion.

Answer 2

Both the Assertion (A) and the Reason (R) are true. But R is not the correct explanation of A.

Explanation:

• The Tyndall effect is defined as the phenomenon of scattering light by colloidal particles.
• The light never scatters in a true or clear solution.
• This is due to the fact that a colloidal solution is made up of scattered particles (like dust and water in the air).
• So, light cannot travel in a straight line.
• Eventually, the light collides with those particles and gets scattered causing a visible light beam.
• The colour of the scattered light depends on the size of the scattering particles.
• Fine particles scatter the light of shorter wavelengths, like blue and violet, whereas, the larger particles scatter longer wavelengths like red and orange.