Question

what happen if concave mirrors are used as rearview mirrors of vehicles ?​

Answer 1

Answer:

We cannot use a concave mirror as a rear-view mirror in vehicles because a concave mirror produces inverted images of distant objects. So, all the vehicles will be seen running upside down in the mirror.

Explanation:

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Answer 2

Answer:

Then you will see an inverted image of the vehicle running behind. (i.e. upside down position).