Multiple choice

Although fog consists of fine drops of water, we cannot see clearly through it because

  1. the light rays undergo total internal reflection in the drops

  2. fine drops of water in fog polarize the light

  3. the fine drops are opaque to the light

  4. the drops scatter most of the light
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fog consists of tiny water droplets suspended in the air. These droplets are large enough to scatter light, which prevents clear vision through the fog.

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