The sign of the magnification produced by a concave mirror is?
Apositive when the image is virtual and negative when the image is real
Balways positive
Cpositive when the image is real and negative when the image is virtual
Dalways negative
Apositive when the image is virtual and negative when the image is real
Balways positive
Cpositive when the image is real and negative when the image is virtual
Dalways negative
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