Question

Assertion: Tyndall Effect is an optical phenomenon of light used to explain
atmospheric refraction.
Reason: The tiny particles of dust disperse sunlight in it falls through foliage in a
forest.​

Answer 1

Answer:

wrong assertion, correct reason

Explanation:

Tyndall effect is light scattering by particles in a colloid or particles in a fine suspension. So, a true solution does not show Tyndall effect due to scattering of light and scattering is directly proportional to size of sol particles.

Hence, assertion is wrong but reason is correct.

hope this helps

Answer 2

Answer: Assertion is False, Reason is True

Explanation:

• Tyndall effect, also called Tyndall phenomenon is scattering of a beam of light by a medium containing small suspended particles—e.g., smoke or dust in a room, which makes visible a light beam entering a window.
• Tyndall effect can be observed when sunlight passes through the canopy of a dense forest. In the forest, mist contains tiny droplets of water, which act as particles of colloid dispersed in air.

Hence Assertion is false and Reason is true