Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall 3 m away by means of a convex lens. What is the maximum focal length of the lens for this purpose
Text Solution
Verified by ExpertsThe correct answer is:
B
To obtain a real image on a screen the minimum distance 
between the object and the screen is 4f.
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