Question -
Answer -
In the given situation,the object is virtual and the image formed is real.
Object distance, u = +12 cm
(a) Focal length of theconvex lens, f = 20 cm
Image distance = v
According to the lensformula, we have the relation:
Hence, the image is formed7.5 cm away from the lens, toward its right.
(b) Focal length of theconcave lens, f = −16 cm
Image distance = v
Accordingto the lens formula, we have the relation:
Hence,the image is formed 48 cm away from the lens, toward its right.