AIPMT PRELIMS2002Physics-Optics
AIPMT PRELIMS 2002 Physics Lens Formula MCQ Question
Type: MCQ-conceptual-Medium-Class 12
A bulb is located on a wall. Its image is to be obtained on a parallel wall with the help of convex lens. If the distance between parallel walls is 'd' then required focal length of lens placed in between the walls is :-
A
Only d/4
B
d/2
C
More than d/4 but less than d/2
D
Less than or equal to d/4
Correct Answer
Option D
Detailed Explanation
Using the lens formula and geometry, the focal length is calculated as d/4 for the image to form on the opposite wall.
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