Question

if magnification is -1/2.what does means​

Answer 1

Magnification. ... A magnification of 1 (plus or minus) means that the image is the same size as the object. If m has a magnitude greater than 1 the image is larger than the object, and an m with a magnitude less than 1 means the image is smaller than the object.

Answer 2

Its means that the image size is half of the object..Also the image is real and inverted due to (-) according to sign convention