Though water is transparent to visible light, it is not possible to see distant objects in fog which consists of fine drops of water. This is so because :
- AFine drops of water are opaque to visible light
- BMost of the light is scattered to create apparent opacity
- CLight rays suffer total internal reflection and are unable to reach the observer's eyes
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (b) Most of the light is scattered to create apparent opacity
Explanation
Each tiny water droplet in fog is transparent, but together they scatter light in all directions. Little light from a distant object reaches the eye directly, and the scattered light blurs everything.
So the fog looks opaque even though water itself is transparent.