Question

5. The focal length of concave mirror is and that of convex mirror is negative) . (positive,
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Answer 1

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f, the focal length, is positive for a concave mirror, and negative for a convex mirror. When the image distance is negative, the image is behind the mirror, so the image is virtual and upright. A negative m means that the image is inverted.

Explanation:

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Answer 2

the focal length, is positive for a concave mirror, and negative for a convex mirror. When the image distance is negative, the image is behind the mirror, so the image is virtual and upright. A negative m means that the image is inverted.

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