Question

To form an image twice the size of the
object, using a convex lens of focal length
20cm, the object distance must be
a. <20cm
b. > 20cm
c. < 20cm and between 20cm and 40cm
d. cannot say​

Answer 1

Answer:

– < 20 cm.

Explanation:

To form an image twice the size of the object, using a convex lens of focal length 20 cm, the object distance must be – < 20 cm.