Microscopes

Normally a light microscope.

Electro-microscopes are only really used in scientific laboratories

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Van Leeuwenhoek made over 500 optical lenses (though they did not necessarily become 500 different microscopes) and can be said to have built at least 25 variations on his basic design of the microscope. Only nine microscopes, of the hundreds he built, remain.

The best magnification of the lenses which still exist is 256 times. It is thought that he may have been able to produce magnifications of almost twice that.

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  Make sure your slide, cover slip and medicine dropper are all clean, dry and dust-free.

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  Place your flat slide on a clean, dry surface.

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  Use your medicine dropper to suck up a few drops of your liquid sample.

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  Squeeze one drop of your liquid sample out onto the direct center of the flat slide.

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  Gently lower your cover slip onto the flat slide. Put one edge of the cover slip down first, before lowering the rest of it. Do not press down on the cover slip once it is in place.

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  Pick up the slide and cover slip combination and gently place it in the viewing tray of your microscope.

I do not exactly know,sorry

You think

I am going to ignore your poor grammar skills on this one, but here is the answer.

You first start on a low power to locate the specimen or bacteria. Then you switch to a high power to get a better look at it. Hope this helps.

nothing it looks like a normal hair

To magnify something by 400x, you would need to use a microscope or other optical device that is capable of enlarging an object 400 times its original size. This means the object would appear 400 times larger when viewed through the lens of the microscope.

A light microscope uses visible light to magnify small specimens. These microscopes typically have a resolution limit around 200 nanometers, meaning they can distinguish objects that are at least 200 nanometers apart. To view smaller structures, researchers often use electron microscopes which have much higher resolution capabilities.

It depends on the microscope. Standard:10x, 40x, 400x.

yes

light microscope

A microscope that uses electrons instead of photons to enhance soon and resolution.

to agitate the solution

After leaving the condenser in a compound light microscope, the light passes through the specimen on the slide. The light is then refracted and magnified by the objective lens, and further magnified by the eyepiece before reaching the eye of the observer.

I have always had the longest objective in position (pointing down), then lowered the lens to what I thought would be close to a good focus. This way, you can rotate the turret to the shorter lenses, and be assured that the lens body will not strike the stage or slide.

This is done through the law of reflection and of course magnification. light is passed through the specimen and through the objective lenses. each objective lenses have different degrees of magnification powers. they have 10x, 40x, and oil immersion lens which has magnification up to 100x. the image is then passed through the eye piece and which also has another set of lens which further enhance the image with a magnification up to 10x and finally we view the magnified object.

Yes, a microscope uses lenses to magnify and make objects appear larger than they actually are. This allows for detailed examination of small structures that are not visible to the naked eye.

The scanning tunneling microscope allowed scientists to visualize and manipulate individual atoms on a surface for the first time. This breakthrough enabled researchers to study atomic structures with unprecedented detail, leading to advancements in nanotechnology and materials science.

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Anton Van Leeuwenhoek is considered the father of microscopy because of the advances he made in microscope design and use.

A gynecological speculum is a medical instrument used during a pelvic examination to visually inspect the vagina and cervix. It holds the vaginal walls apart to allow the healthcare provider to see any abnormalities or perform procedures such as Pap smears or collecting samples for testing.

compound and light microscopes are used in some labs compound uses a mirror to reflect and a light gives a light source to it

The advantages are:

(a) Basic identification of the materials was first performed by light microscopy and gross analysis. This provides a large base of published information against which to check analysis and analytical technique.

(b) The analysis is specific to fibers. The minerals present can exist in asbestiform, fibrous, prismatic, or massive varieties all at the same time. Therefore, bulk methods of analysis such as X-ray diffraction, IR analysis, DTA, etc. are inappropriate where the material is not known to be fibrous.

(c) The analysis is quick, requires little preparation time, and can be performed on-site if a suitably equipped microscope is available.

The disadvantages are:

(a) Even using phase-polar illumination, not all the fibers present may be seen. This is a problem for very low asbestos concentrations where agglomerations or large bundles of fibers may not be present to allow identification by inference.

(b) The method requires a great degree of sophistication on the part of the microscopist. An analyst is only as useful as his mental catalog of images. Therefore, a microscopist's accuracy is enhanced by experience. The mineralogical training of the analyst is very important. It is the basis on which subjective decisions are made.

(c) The method uses only a tiny amount of material for analysis. This may lead to sampling bias and false results (high or low). This is especially true if the sample is severely inhomogeneous.

(d) Fibers may be bound in a matrix and not distinguishable as fibers so identification cannot be made.

*NOTE:Source taken from http://www.osha.gov