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Sahay Sir > Question Answers > AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 16 - Waves > The focal length of objective and eye piece lens of a microscope are 1.6 cm & 2.5 cm respectively. Distance between two lenses is 21.7 cm .If the final image is formed at infinity what is the linear magnification?

The focal length of objective and eye piece lens of a microscope are 1.6 cm & 2.5 cm respectively. Distance between two lenses is 21.7 cm .If the final image is formed at infinity what is the linear magnification?

A point source is kept at a distance of 1000 m has an illumination I. To change the illumination to 16I the new distance should become.