At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image at 36 cm from it? What will be the magnification produced in this case?
Given,
Focal length of convex lens f= 18 cm
Image distance v= 36 cm
We know that lens formula is:
Substituting the given values in formula
u = -36
Substituting the values in the formula:
31