Microscopes
The microscope is a laboratory instrument used to observe small objects that are invisible to the naked eye. Microscopy is the science of investigating small objects and structures using a microscope. Microscopic means being invisible to the eye unless aided by a microscope. There are different types of microscopes. A simple microscope uses one lens and magnifies the sample from 70 to 250 times. A compound microscope has two lenses and magnifies the sample 2000 times. In the electron microscope, electron beams produce images hundreds of times. Microscope History: Four thousand years ago, there were objects resembling lenses. Even though Greek descriptions and a lot of writing are there for the optics and optical properties of water-filled spheres, the widespread use of lenses in eyeglasses came in the 13th century . The earliest microscopes were single-lens magnifying glasses with limited magnification. In the 14th century , Italians made the first eyeglass lens. In 1590 , Zachar