What is tyndall effect ?
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Tyndall effect: The phenomenon of

scattering of light by colloidal particles

gives rise to Tyndall effect.

Examples :

1. Tyndall effect can be observed

when sunlight passes through a canopy of a dense forest, then the

path of light becomes visible.

2. The visible beam of headlight in fog.

3. When a beam of light enters a

smoke filled room through a small

hole, then path of light becomes

visible.

Explanation:

Tyndall effect, also called Tyndall phenomenon, 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. ... The effect is named for the 19th-century British physicist John Tyndall, who first studied it extensively.

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explanation:

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.