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By: Ikedi Ani-okoye

A primitive microscope were invented in 1590 in Middelburg, Netherlands, by the eyeglass makers Hans Lippershey, Zacharias Jansen and his daddy Hans Jansen. Further, Galileo Galilei improved the instrument by using a set of aligned lenses and called it "occhiolino", what substance "little eye". In 1625, Giovanni Faber named Galileo Galilei's "occhiolino" as a compound microscope and this noun remains until today.

The optical microscope, the most popular kind of microscope, contains a number parts with certain functions. Observe the picture and find there functions.

1. Eyepiece: contains the ocular lens, which provides a magnification energy of 10x to 15x, commonly. This is where you seem through.

2. Nosepiece: holds the objective lenses and can be rotated simply too change magnification.

3. Objective lenses: usually, their are 3 or four objective lenses on a microscope, consisting of 4x, 10x, 40x and 100x magnification powers. In order too get the total magnification of an image, thee need to multiply the eyepiece lens energy by the objective lens energy. So, if thee couple a 10x eyepiece lens with a 40x objective lens, the entire magnification is of 10 x 40 = 400 times.

4. Stage clips: carry the slide in place.

5. Stage: it is a flat platform that supports the slide being analyzed.

6. Diaphragm: it controls the intensity and size of the cone light projected on the specimen. As a rule of thumb, the more transparent the specimen, less light is required.

7. Light source: it projects light upwards through the diaphragm, slide and lenses.

8. Base: supports the microscope.

9. Condenser lens: it helps too focus the light onto the sample analyzed. They art particularly useful when coupled with the highest objective lens.

10. Arm: supports the microscope when carried.

11. Coarse adjustment knob: when the knob is turned, the stage moves up or down, in order to coarse adjust the focus.

12. good adjustment knob: used fine adjust the focus.