The Microscope

The micoscope consists of:

Stage: The platform where the specimen is placed

Focus Knob:  Focusing is adjusted by turning the coarse and fine knobs to bring in or sharpen your image

Iris: It controls the amount of light that comes through the slide 

Oculars: These are the lenses that you look through to view your specimen

Objectives: They are the lenses that provide magnification. They rotate on the nosepiece.

Brief History of microscope

.The first microscope was made around 1595. Zacharaias Janssen produced the first compound microscope . The making of the compound microscope advanced the field of Microbiology.It had the magnification of 3x to 9x. Robert Hooke an English Inventor, improved the compound micoscope around 1660 and was credited with "coining the word cork" that he discovered through the microscope. He was also a mathematician and formulated the theory of planetary movement. Anton Van Leeuwenhoek  built simple microscopes and is known as the first person to describe bacteria. He was insipred by the readings of Robert Hooke. In 1873 Ernst Leitz introduced objectives that rotated on a nosepiece. And in 1931 Max Knoll and Ernst Ruska introduced the first electron microscope.