How+to+use+a+microphone


 * __ Parts of a Microscope __**


 * 1) ====The Eyepiece: is where you look into the microscope. Eyepieces are usually labelled x10 or x15. (This is the magnification.)====
 * 2) ====The Objective Lens: is able to change the magnification. There are usually three objective lenses. Typically these would be labelled X4 x10 and x40.====
 * 3) ====The Stage: is the part of the microscope which holds the slide.====
 * 4) ====The Coarse Focus: the larger knob used to focus the microscope on the item you are examining.====
 * 5) ====The Fine Focus: is used to change the focus slightly, so that the specimen (the item under examination) is very clear.====
 * 6) ====The Light: is used to illuminate the specimen.====

**Magnification**
====The magnification of a microscopeis calculated by multiplying the eyepiece power by the objective power. Therefore if we have a X10 eyepiece and have selected a x15 objective lens the magnification is 10x15 so that is X150. This means that the object we are looking at (the Specimen) is being magnified 150 times.====

What magnification is the specimen being viewed at if the eyepiece is set to x10 and the objective lens is set to x40?

 * __ How to use a microscope __**


 * 1) Carry the microscope with one hand on the **neck** and one on the **base.**
 * 2) Plug the microscope in, and place the slide on the microscope stage, with the specimen directly over the **centre** of the glass circle on the stage (directly over the light). Then you have a 9 out of 10 chance of finding the specimen as soon as you look through the eyepiece! NOTE: //If you see only your// **//eyelashes//**//, move// **//closer. Close//** //your// **//other//** //eye.//
 * If, //and ONLY if//, you are on the **Low Power** objective, lower the objective lens to the **lowest point** with the coarse knob, then focus by //slowly// raising the lens.
 * 1) Centre the specimen.
 * 2) Once the picture is as clear as you can make it, adjust it with the fine focus knob.
 * 3) Adjust the **Diaphragm** as you look through the **Eyepiece**, and you will see that MORE detail is visible when you allow in LESS light! Too much light will give the specimen a washed-out appearance. Try it out!
 * 4) ** Without changing the focus knobs, ** switch it to High Power. If you don’t centre the specimen you will lose it when you switch to High Power. Once you have it on High Power remember that you only use the fine focus knob! The High Power Objective (430x) is very close to the slide. Use of the coarse focus knob will scratch the lens, and crack the slide.