Binoculars - an optical device which enlarges the object in question. It is a structure of two parallel and connected together telescopes. Each tube consists of a casing inside which are placed prisms, lenses, mirrors.Lens - curved glass shape. There are two kinds of lenses: concave and convex. O...

Telescope used for observation of distant objects. With the help of the lens system of the device allows you to see the exact, detailed enlarged image of the object located in the far distance from the beholder.An effect of increasing by a combination of convex and concave circular windows in the...

Microscope - not only for professional use the unit, but also a way of bringing science to children and adolescents. There are some differences in the rich range of devices.Content:The device and principle of operationHow to Choose a MicroscopeBest Microscope SolderingBest binocular microscopeBes...