Multiple choice general knowledge

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 that scatter light in all directions (Tyndall effect), which reduces visibility by disrupting the direct path of light rays from objects to our eyes. The droplets are not opaque but act as scattering centers that diffuse light rather than transmitting it clearly.