One cannot see through fog because .......... .

Fog absorbs light

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Refractive index of fog is unity

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Light suffers total internal reflection at the droplets in fog

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Light is scattered by the droplets in fog

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Solution

The correct option is D Light is scattered by the droplets in fog
Answer is D.
We cannot see through fog because of scattering.
Atoms and molecules in the air, including anything carried in the air like dust or smoke, will scatter light. Water droplets, as they are present in fog, also scatter light. The light falling on an object and reflected to a viewer can be scattered to heck and back before it gets to the place where it can be 'seen' by an observer. So the observer just sees a 'whiteout' instead of being able to make out anything beyond a few meters or so.

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Q. One cannot see through fog because :

Question 9
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light:

(a) is scattered the most by smoke or fog
(b) is scattered the least by smoke or fog
(c) is absorbed the most by smoke or fog
(d) moves fastest in air

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similarly Fog(at the morning) is also made of water droplets then when light passes through Fog why does it scaters,it should also form rainbow right?

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