Question

hey! which among the following is negatives or positive in concave and convex mirror
1) focal length
2)image distance

Answer 1

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.A negative m means that the image is inverted. Positive means an upright image.

Answer 2

focal length is negative in concave mirror and positive in convex mirror.

image distance is negative in concave mirror except a position when the object in placed in between focus and pole. And image distance is positive in convex mirror.

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