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Why are electon microscopes capable of revealing details much smaller than those seen through light microschopes?
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What microscope is the least powerful?
Short Answer: The unaided human eye which has a magnification of 1X and can resolve details down to about 0.2 millimeters. Longer Answer: Depending on the type of lens a single lens magnifier can magnify up to about 12X and resolve down to 17 micrometers. A multiple lens achromatic magnifier can go up to about 25X and resolves down to about 8 micrometers. Stereo microscopes that can easily view 3-D objects go up to about 1000X and resolve down to about 150 nanometers. Likewise, any optical microscope is limited by the diffraction limit of light to about 1300X of usable magnification. More magnification will just produce a larger version of the image that is blurry since it is not possible to sharpen the focus beyond the 150 nanometer diffraction limit. Microscopes that use ultraviolet light, which has a shorter wavelength that can focus tighter, can resolve down to 10s of nanometers or about 10 times better than visible light microscopes for a magnification of 10,000 X. Modern Scanning Electron Microscopes (SEM) are capable of resolving down to about 0.2 nanometers which translates to a useful magnification of 1,000,000 X. Specialized types of electron microscopes (Field Emission Transmission Electron Microscopes) can resolve down to 0.05 nanometers which translates to a magnification of 2,500,000 X. For reference, a carbon atom is about 15 nanometers in diameter.
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How is the electron microscope different from a compound microscope?
Short Answer:It is fair to say that a light microscope and an electron microscope use the same principles, but the technical details are enormously different.The similar principles mean that both enlarge images of small object and have a lensing system to put an illuminating beam on a sample and another system to carry out the refocusing of the scattered beam into an enlarged image to be viewed.Beam: 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.Lenses: Lenses in an optical microscope are glass, though special types of glass improve performance, it is fundamentally the same material as common glass. Electron microscopes employ magnetic fields and electron fields to guide and focus the electron beam. Electron microscope this do not have physical lenses.Resolution: 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.Magnification: The useful magnification of an electron microscope is also in the range of a thousand times greater than an optical microscope.Samples: Optical microscopes can view basically anything that one can put under the objective, though special dyes are often used to enhance features of the sample. Electron microscopes typically require the sample to be in a vacuum so the electrons are not scattered by air. Samples frequently require special treatment with a metal coating such as gold because the high energy electrons are not strongly scattered by small atoms such as carbon, oxygen and nitrogen that are common to biological samples.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.More Specifics:Electron microscopes use electrons to illuminate and form an image of a sample and light microscopes use light to illuminate and form an image of a sample.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.
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Correction of what exactly? You could have filled in the details.
Why are electron microscopes capable of revealing details much smaller than those through light microscope?
Electron microscopes are capable of revealing details as much as 1000 times smaller than those visible in light microscopes because the wavelengths of electrons are much shorter than those of light.
Why are electrons microscopes capable of revealing details much smaller than those seen through light microscopes?
They're dope like that cx
What are electron microscopes capable of revealing details much smaller than those seen through light microscope?
Because the electron beam has a wavelength lower than visible light.
Why are electron microscopes capable of revealing details much smaller than those shown in a light microscope?
To put it in very simple terms, because the wavelength of an electron is much smaller than the wavelength of visible light.
Why are electron microscopes capable of revealing details much smaller than those seen through light microscopes?
Electron microscopes are capable of revealing details as much as 1000 times smaller than those visible in light microscopes because the wavelengths of electrons are much shorter than those of light.
Why are electron microscopes capable of reveling details much samller than those seen through light microscopes?
electron microscopes are more powerful than light ones.So that is why I answerd.
What instrument used to see small details of a specimen is the?
Microscope. There are several types of microscopes available depending on the specimen in question. Refer to the site below for more information on the types of microscopes.
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How can microscopes help us do an experiment?
Microscope will help us to view/see even very minute details of anything being experimented.
Are Scanning microscopes used to observe individual atoms?
No. Scanning Electron Microscopes (SEM) use electrons to view microsopic details down to the granular structure of material. Since it uses electrons, it could not detail anything the size of an Atom.
What can be seen with a dissecting microscope?
A dissecting scope is more accurately known as a stereo microscope, a microscope with two eyepieces. It is not capable of magnifying to the same degree as other types of light microscopes, but such a degree of magnification is not usually necessary for the tasks they are used for. As the other name suggests, they are often used for fine dissection or examination. Most are not capable of examination on a cellular level, but they can make out the details of fine vascular or nervous structure or other such small structures.
Why are electron microscopes capable of revealing details much smaller that those seem through light microscope?
The resolving power of a microscope is a linear function of the wavelength - An optical microscope's wavelength is that of light, and the electron microscope's - that of vibrating electrons. As the electron microscope's wavelength is about 100,000 times smaller than that of light, we get a much better resolving power.
