traditionally has a refractive index close to standard crown glass. oil immersion objectives are designed for the refractive index of this oil. they are optimal when working close to the coverglass or with samples embedded in a medium with a refractive index close to that of immersion oil. for samples...
in oil consumption and production oil consumption annual change (thousand b/d) oil production annual change (thousand b/d) increases increases china us iran brazil india canada algeria iraq russia australia decreases decreases mexico iran italy venezuela pakistan saudi arabia taiwan mexico venezuela...