what is meant by the statement the focal length of a concave mirror is 20cm

what is meant by the statement the focal length of a concave mirror is 20cm. There are some references to what is meant by the statement the focal length of a concave mirror is 20cm in this article. If you are looking for what is meant by the statement the focal length of a concave mirror is 20cm you've came to the right place. We have posts about what is meant by the statement the focal length of a concave mirror is 20cm. You can check it out below.

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