Properties Of Microscope Objective Lens And Its Magnifying Equation!

The objective lens of a microscope is certainly in nature to that of an eyepiece lens. Nevertheless, both still have a function to complement the function of the microscope.

Both ocular and objective lenses will help the microscope see small objects.

Launching from Encyclopedia Britannica, the purpose of the microscope is to collect the diffracted light waves and beat them until interference occurs.

As a result, the microscope will create an image of an object that is larger than its original size, so that humans can see and see it with their own eyes.

What are the properties of the objective lens of a microscope?

You will be familiar with microscopes. In fact, you can learn this object from school because of its very important function in science.

The function of the microscope itself is to help one see small objects that cannot be seen by the eye.

To be able to function properly, binoculars use two types of lenses, namely the objective and the eyepiece.

Launching from Lumen Learning, the objective lens on a microscope is a convex lens, with a shorter focal length than the eyepiece.

It is named objective lens because this lens will be closer to the object or objects that the microscope will examine.

With a sufficiently short focal length, this makes the objective lens to produce a magnified image of the object and will be the first image formed on a microscope.

So, the properties this lens produces are magnified, real and also inverted. Images captured by the objective lens will then continue to pass to the ocular lens.

Unlike the properties of real microscope objective lenses, ocular lenses actually have the property of a virtual image. The eyepiece is also behind the objective lens.

The ocular lens is also a key to the invention of the first microscope in the early 1600s. The image visible in the eyepiece is the same as that seen by the observer using a microscope.

objective lens magnification equation

The magnification of the objective lens will always remain the same when the eye is maximally adjusted or when the eye is not adjusted.

This may be because the objective lens is used to form an image of the original object, not directly related to the observer’s eye.

In other words, the magnification of this objective lens is the magnification of the positive lens. Now, on a positive lens, the equation will be:


The crowd represents the magnification of the objective lens.
sob means the image distance for the objective lens.
Sob means the distance from the object to the lens of the object.
hob is the height of the shadow.
Hob means the height of the object.

The properties of microscope objective lenses differ from those of eyepiece lenses, but they still have the same important function.

Because the objective lens will send the image of the object to the eyepiece so that it can be seen by the researcher.

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