An optical instrument uses eye lens of power 16D and objective lens of power 50D and has a tube length of 16.5 cms . Name the optical instrument and calculate its magnifying power ,  if it forms the final image at infinity.


Dear Student,
                         This is a compound microscope because in compound  microscope eyepiece has smaller powerand magnifying power=-lDfofe    here l  tube length Dleast distance of clear vision fo and fe are focal length of  objective and eyepiece respecitvilysomagnifying power=-.165×.251/50×1/16=-33
Regard

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