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Ananya Shree

Class 12th
Physics
2 years ago

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 large convex lens. What is the maximum possible focal length of the lens required for the purpose?

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Muskan Anand

2 years ago

Given: The distance between the object and the image is d=3m. The maximum focal length of the lens  is given by: fmax​=4d​ For real image fmax​=43​=0.75m

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