Optics

compound microscope

Depending on the type and quality of the microscope, it can magnify an image about 1200 times.

We can relate various equipment, whether electronic, mechanical, thermal, etc., with the study of Physics. For example, who doesn’t know a magnifying glass, a camera, a magnifying glass or a microscope? It may be that you have not had contact with some equipment, but you must have heard of them.

Therefore, we can call optical equipment any convenient combination of optical devices, such as lenses and mirrors. In such a way, we will know a little more about an optical equipment that is of fundamental importance for several studies and analyses. We’re talking about the microscope.

In Physics, we call a compound microscope , or just a microscope, the instrument that has the purpose of making observations on bodies or objects whose dimensions are extremely small. If we stop to carry out a detailed observation under a microscope, we will see that it basically consists of two converging lenses mounted coaxially. We say coaxially because the lenses are mounted with their axes coincident.  

We call the objective lens, of the microscope, the converging lens that is installed close to the object or body to be observed. The lens that is closest to the observer’s eye is called an ocular lens . The focal length of the objective lens is on the order of millimeters, whereas the focal length of the eye lens is on the order of centimeters.

We can determine the transverse linear magnification (A) of the compound microscope through the product of the transverse linear magnifications of the objective lens and the ocular lens. Therefore, we have:

Multiplying, member by member, (II) and (III), we have:

Equating (I) and (IV), it is concluded that:

A= A ob  . the oc

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