Answer:
It curves inward
Explanation:
Of the choices given it is the only one that makes sense
Considering the concave mirror to be a part of a large sphere and the outer surface polished, we can say it curves inward.
There are three types of mirrors: plain mirrors, convex mirrors, and concave mirrors.
The plain mirrors are the ones which we use in our houses. It has both the sides flat, front and back. With the back end polished to reflect light.
It is obvious that the back end of the mirror must be silvered or polished in order to reflect light.
In the case of concave mirrors, if we consider it a part of a large sphere, then the outer surface is silvered or polished and the inner surface is the surface that is used as a mirror,
So, we can say that a concave mirror curves inward.
Learn more about concave mirrors:
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