Question

Where should an object be placed in front of a convex lens to get a real image ofthe size ofthe object?

a. At the principal focus of the lens

b. At twice the focal length

c. At infinity

d. Between the optical centre of the lens and its principal focus​

Answer 1

option b. at twice the focal length is the answer.

Answer 2

Answer:

option : d

Explanation:

between the optical centre of the lens and it's principal focus