Aconcave mirror forms the image of a very distant object at 18.0 cm on the same side of its reflecting surface. what is the focal length of this mirror? (a) + 36.0 cm (b) + 18.0 cm (c) - 18.0 cm (d) - 36.0 cm

(B) +18 cm

Explanation:

Given that the distance of the object is infinity.

And the image is formed at a distance of 18 cm, means .

Now as we know that the mirror formula is,

Now put the values of u and v

Therefore the focal length of the mirror is +18 cm.

all of the answers are correct.

falsification is manipulating research materials, equipment, or processes or changing or omitting data or results such that the research is not accurately represented in the research record. plagiarism is the appropriation of another person's ideas, processes, results, or words without giving appropriate credit.

explanation:

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