A point source of light is kept at adistance of 15cm from a converging – InterviewSolution

1.	A point source of light is kept at adistance of 15cm from a converging lens on its optical axis.A sharp image is formed on the screen which is placed at a distance 20cm from lens find the focal length of lens
Answer» A point source of light is kept at adistance of 15cm from a converging lens on its optical axis.A sharp image is formed on the screen which is placed at a distance 20cm from lens find the focal length of lens

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