JEE Main 20204 Sep, Morning shiftPhysicsMediumOptics190× since 2002
In a compound microscope, the magnified virtual image is formed at a distance of 25 cm from the
eye-piece. The focal length of its objective lens is 1 cm. If the magnification is 100 and the tube
length of the microscope is 20 cm, then the focal length of the eye-piece lens (in cm) is __________.