An object is placed 15 cm from a thin convex lens on its principle axi – InterviewSolution

1.	An object is placed 15 cm from a thin convex lens on its principle axis and a virtual image of certain size is formed. Now the object is moved 10 cm away from the lens and real image of the same size as that of the previous) virtual image is formed. The focal length (in cm) of the lens is .
Answer» An object is placed $15 cm$ from a thin convex lens on its principle axis and a virtual image of certain size is formed. Now the object is moved $10 cm$ away from the lens and real image of the same size as that of the previous) virtual image is formed. The focal length (in cm) of the lens is .

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