Question

the focal length of ____mirror is positive . a . plane b. concave c. convex d. none of these .

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Answer 1

Answer:

Any distances measured on that side are positive. Distances measured on the other side are negative. f, the focal length, is positive for a concave mirror, and negative for a convex mirror. When the image distance is positive, the image is on the same side of the mirror as the object, and it is real and inverted.

Answer 2

Answer:

The focal length of concave mirror is positive

Explanation:

Concave is the answer

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