Give some examples of Tyndall effect observed in your surroundings? This question has multiple correct options

A. Sunbeam coming from ventilation

B. Milk in a glass appearing faint blue

C. Sunbeam coming from behind the clouds

D. Flour suspended in water

Tyndall effect: the scattering of light by colloidal particles that makes the light path visible.

Common examples

• Sunlight streaming into a dark room through a crack/vent.
• Headlight beams visible in fog/smog.
• Sunbeams radiating from behind clouds.
• Light scattered by tiny water droplets or dust in air.

Checking the options

• A. Sunbeam from ventilation — Yes. Classic Tyndall effect; dust/colloid in air scatters light, so the beam is visible.
• B. Milk in a glass appears faint blue — No (not a visible beam). Milk is a colloid and does scatter light (hence bluish tint), but it doesn’t show a visible light path/beam here.
• C. Sunbeam from behind clouds — Yes. Cloud droplets scatter sunlight, making distinct rays visible.
• D. Flour suspended in water — Yes. Flour forms a colloid; the suspended particles scatter light, so the beam is seen.

Correct options: A, C, and D.