Results for: Microscope

1 Contribution

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What is a microscope?

A microscope is a scientific instrument which magnifies objects that are too small to be seen by the naked eye. Microscopes come in two varieties - electron microscope (EM) an… (MORE)

Uyi555

127 Contributions

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In Microscopes

What do microscopes do?

Microscope(s) magnify or enlarge images of structures that are too small to see with your eyes.

Jack Cook

29 Contributions

microscope, refractometer and polarimeter sales and service.

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In Microscopes

Who uses microscope?

Microscopes magnify objects not normally visible to the human eye. A number of professions in the fields of biology, chemistry, zoology, criminal justice, medicine and more us… (MORE)

Wendddy

395 Contributions

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In Biology

What is microscopic?

There are tons of things that are microscopic, such as bacteria, viruses and cells. Anything too small to see with the human eye would be considered "microscopic."

Jack Cook

29 Contributions

microscope, refractometer and polarimeter sales and service.

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In Microscopes

What are the microscope?

Microscope - device used to view objects which are too small to see or explore with your eye alone. Compound - when a scope has a minimum to two magnifying lenses. Binocul… (MORE)

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In Bedbugs

Are bedbugs microscopic?

No. Their sizes can range to just slightly larger than the tip of a ball point pen to nearly a quarter inch in length.

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In Microscopes

Where is the diaphragm on the microscope?

Diaphragm in microscope is kind of shutter which can be used to adjust the ammount of light intensity. It is prresent just above the condensor which is known as Abb… (MORE)

Kayleennn

4 Contributions

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In Microscopes

Why is the microscope called microscope?

because the pre-fix "micro" means small or out of foucus and the suffix "scope" means to see

Lynda pruden

2,589 Contributions

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In Microscopes

What is the difference in microscope and microscopic?

a microscope is an instrument for observing something up close; microscopic is something that is examined. For example, he examined a microscopic portion of the chemical.

Michaelalanlee

27,193 Contributions

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In Microscopes

Which microscope has a better resolution a light microscope or a electron microscope?

An electron microscope is capable of much higher resolution and greater magnification than a light microscope. Short Answer: Electron microscopes have much better resolution… and are capable of much higher magnification than light microscopes because the wavelength of the electrons is thousands of times smaller than the wavelength of light. Light microscopes can typically resolve structures to a fraction of a micron compared to electron microscopes which in practice achieve resolutions of a few nanometers. Practically, electron microscope can have almost a thousand times greater resolution than an optical microscope. The useful magnification of an electron microscope is also in the range of a thousand times greater than an optical microscope. The actual performance of any microscope depends on its design and lensing system and so significant variation exists in the above practical characteristics and performance of both types of microscopes can be enhanced in various ways. Long Answer: An electron microscope uses an electron beam to illuminate a specimen and produce the image. An optical or light microscope uses a light beam to illuminate a specimen and produce the image. A microscope of either type is characterized by its magnification and resolving power. The magnification depends on the lensing system and can be increased to any degree, but the maximum useful magnification is limited by the resolving power. The resolving power of a microscope can not be better than the limits placed on it by the size of the wavelength of the illuminating beam. The smaller the wavelength, the smaller the structures that can be resolved in them image. Visible wavelengths of light are a few hundred nanometers. An electron microscope operates with electrons accelerated to a few hundred thousand electron volts of energy and with a wavelength in the range of few hundredths of an Angstrom. An electron microscope has a theoretical resolving power that is much greater than a light microscope and can reveal smaller structures because the electrons used have wavelengths (few hundredths of Angstroms) almost 100,000 times shorter than visible light (few hundred nanometers). An optimized electron microscope can achieve a practical resolution of a few Angstroms and a useful magnifications in the millions of times. A good light microscope can resolve structures smaller than a micron but is limited to about a few hundred nanometers resolution. The useful magnification of a light microscope is not much more than a thousand times. The electron microscope uses electrostatic and electromagnetic fields to act as lenses to control and focus the electron beam and to form an image. An optical or light microscope employs glass lenses. (MORE)