NEET Physics Reflection MCQ Question
A convex lens is used to project an image of a bulb on a screen placed 90 cm away from the object. If the lens forms images at two different locations separated by 20 cm, what is the focal length of the lens?
20 cm
30 cm
25 cm
35 cm
Correct Answer
Detailed Explanation
Using the lens formula and the given distances, the focal length can be calculated by leveraging the lens positions and distances provided in the problem.
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