An oil-immersion objective is a high-powered microscope objective that uses a drop of oil between the objective lens and the specimen to reduce the refractive index between them. This allows for greater resolution, since the oil has a higher refractive index than air, and a greater numerical aperture (NA) than air. Oil immersion Principle of […]
Scientific Revolution Of The 17th Century. It was invented in the Netherlands by two spectacle makers, Hans and Zacharias Janssen, in 1590. The first compound microscope was created by Galileo Galilei in 1609. The development of the microscope helped to revolutionize the way scientists studied the natural world, allowing them to observe and measure the […]
