An object is placed on the optic axis and in front of a converging lens of focal length 38 cm such that its image size is 1.5 times the object size. Calculate the distance of the image from the lens. Express your answer in centimeter.
1/f=1/di + 1/do
The Attempt at a Solution
Image size is 1.5 times the object size. So 1.5=-di/do
So , do=-di/1.5
So , 1/38=1/di + 1/(-di/1.5) = 1/di - 1.5/di =-0.5/di
Thus di=-0.5*38= -19 .
But the answer is wrong . Please help.