In a projection lantern of focal length f, the object distance u, is such that
A.
u > 2f > f
B.
u < f < 2f
C.
u = f < 2f
D.
f < u < 2f
Correct Answer: Option D
Explanation
the object is always located between the optical center of the lens and twice the focal length. or the object is placed at a point between F and 2F to produce a real, enlarged, upright image of the inverted object.
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