The distance of object from the lens = - 60 cms (since the object is on the left-hand side of lens and acc. To our sign convention)
The focal length of the convex lens = +30 cms ( focal length of convex length is positive.)
Height of object = 3 cm
Using lens formula
V = + 60 cms
Hence the image is at a distance of 60 cms from the lens and the image is real.
Using magnification formula
M = -1
Hence, the image is of the same size as that of object and the image is inverted.
Rate this question :