Question
In Example 9.3 (concave lens, f = -15 cm, v = -10 cm, u = -30 cm), the calculated magnification is approximately +0.33. This means the image is
real, inverted, and one-third the object's size
virtual, erect, and one-third the size of the object
virtual but three times larger than the object
real and exactly the same size as the object
Detailed Explanation
A positive magnification of about +0.33 (1/3) indicates the image is virtual, erect, and one-third the size of the object, consistent with a concave lens always giving virtual, erect, diminished images.