Question
When is the magnification produced by a lens (1) positive (2) negative?
✓
Answer
The magnification produced by a lens is
(1) Positive when the image is virtual (as it is erect)
(2) Negative when the image is real (as it is inverted).
(1) Positive when the image is virtual (as it is erect)
(2) Negative when the image is real (as it is inverted).
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