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,rotate
@Gyro Gearloose

Note for OP
+solved @user1 @user2...
to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.magnification of eyepiece should remain fixed i.e 1+D/f = 6 right ?
so mag of objective initially = 50/6
now my doubt is only separation between lenses is changed
i am not able to grasp how the magnification changes
since magnification of objective is simply v/u where both the quantities are fixed
and unaffected by change in separation of lenses