For a convex lens to form a real image, the distance between the object and the screen will be:
A
equal to the focal length of the lens
B
less than the focal length of the lens
C
twice the focal length of the lens
D
four times the focal length of the lens
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Twice the focal length of the lens: this is because, for a real image to be formed, the object must be placed outside the focal length of the lens, typically at a distance greater than twice the focal length.
Source: WAEC / JAMB / NECO Classroom Archive (Record #72052)