Jack is using an OPTICAL MICROSCOPE. This type of microscope uses a light that is visible in order to magnify the samples sharply. The optical lenses refract the lenses which means that light is set to an angle as it bounces through the glass lens. There are actually three types of optical microscopes: The compound microscope which is built with dual lenses and bigger magnification, stereo microscope which provide a view of the specimen that is 3D, and confocal laser scanning microscope that is so advanced that it can delve into observing the specimen in detail, and often with the help of computer
