Physics-Refraction
NEET Physics Refraction MCQ Question
Type: MCQ-diagram based-Medium-Class 12
In the diagram of image formation by a double convex lens, what is the relationship between the object distance (OB), image distance (DI), and the focal length (f) when the object is placed at infinity?
A
DI = f
B
OB = f
C
OB = DI
D
OB = 0
Correct Answer
Option A
Detailed Explanation
When the object is at infinity, the image formed by the lens is at its focal point, thus DI = f, as per Eq. (9.20) in the NCERT context.
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