Headlights of cars, and other type of light in which spherical mirrors are used would have not been there. We have to find a substitute for this type of mirror.


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If we did not know about spherical mirrors maybe doctors could not view our organs like teeth,ear,etc.(doctors use spherical mirror fixed on spoon-like structures to focus light).
Streetlights would have to be maximum as there was nothing that a single light can diverge.
The rear view mirror of cars would not be there and the drivers would have to think of a new method to solve that problem.

So we have a lot of advantages on the discovery of mirrors.
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