A driver while driving on a straight road during summer days observed water on the road ahead of him. Can you tell the reason why such formations take place?
Answers
Answer:
We see water on roads due to 'mirage' effect . Basically in this refraction of light is the main cause. As in summer the air nearer to road is more hot than the air which is slightly farther.
Explanation:
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Answer: The driver observes water on the road during summer days because of phenomenon called Total internal reflection ( TIR).
Explanation:
Total internal reflection :- when light moves from denser to rarer medium it bends away from the normal. If the angle of incidence of ray in the denser medium increased then the angle of refraction of refracted ray in the rarer medium also increases, at a particular angle of incidence in the denser medium the angle of refraction becomes 90° ,that means the refracted ray just move along the line separating the two medium. This angle of incidence is called critical angle.
If light ray moving from denser to rarer medium have angle of incidence more than critical angle then no light will be refracted and all of the light rays will be reflected into the same medium. This is called total internal reflection.
Explanation of the given phenomenon :- In summer days roads are hot and the air that is present in vicinity of road is also hot. As we move up from the road the hotness of air decreases and with this the density of air increases. Thus the refractive index decreases as we move from upper layers of air to lower layers.
When light from an object approaches road, then due to refraction from denser to rarer medium the angle of incidence in successive layer keeps on increasing , at a particular layer the angle becomes more than critical angle and the rays gets reflected , thus driver see an inverted image of the object , and due to this reason it looks like water is present there from where the reflected image is forming.
This particular phenomenon is called mirage.
