microscope that uses a focused beam of electrons to produce a greatly enlarged image of minute objects, such as a virus, in the same way that light is used in a compound microscope
An instrument that uses an electron beam to form clear and highly magnified images of microscopic structures. Electron microscopes cannot take pictures of living organisms.
Abbreviated EM. A microscope in which an electron beam replaces light to form the image. See the entire definition of Electron microscope
a microscope that is similar in purpose to a light microscope but achieves much greater resolving power by using a parallel beam of electrons to illuminate the object instead of a beam of light
a special kind of microscope designed for looking at very small objects
a special type of microscope used to look at things regular light microscopes cannot
A form of microscope that operates by bombarding a thin object with electrons instead of light and detecting areas where electrons don't get through (shadow), indicating the shape of the object above.
A microscope employing a beam of electrons instead of a light source in order to achieve magnification beyond the range of a light microscope (x 1,000 to x 500,000).
An extremely powerful microscope that uses beams of electrons instead of light to magnify objects. Traditional light microscopes magnify images 1,000-2,000 times; electron microscopes can magnify 300,000 times or more.
A powerful microscope that uses beams of fast-moving electrons instead of light to magnify samples. Powerful magnets focus the electrons into an image.
Invented in the 1930's, an electron microscope uses focused beams of electrons to create extremely magnified images. Traditional light microscopes (visible light passed through a series of magnifying lenses) can only magnify images 1,000 to 2,000 times - the electron microscope made it possible magnify images 300,000 times or more. To create the images, a filament inside an electron "gun" shoots a stream of electrons through a stack of electromagnetic lenses, which focus the electrons into a beam. The beam is directed to a fine point on the specimen, and scans across it rapidly. The sample responds by emitting electrons that are picked up by a detector inside the sample chamber, beginning an electronic process that results in an image that can be displayed on a TV screen.
A microscope in which a beam of electrons is used to form a magnified image of the specimen.
a powerful microscope that uses a beam of electrons, rather than a light source, to magnify samples
An electron-optical instrument that utilizes a beam of electrons, rather than light, to focus on cell surfaces of a very thin specimen to produce an enlarged image on a fluorescent screen or photographic plate. Because resolution (the ability to distinguish adjacent objects as separate) is better and magnification 1,000 times that of an optical light microscope is possible, electron microscopy can help determine the nature of tumors and of kidney disease. http://www.everythingbio.com/glos/definition.php?word=Electron+microscope
A powerful microscope that uses beams of fast-moving electrons instead of light waves to enable objects to be observed.
A microscope (device used to magnify small objects) that uses electrons (instead of light) to produce an enlarged image. An electron microscope shows tiny details better than any other type of microscope.
A microscope that bounces atom particles (electrons) off objects to create an image on film.
A powerful microscope that employs a stream of electrons to magnify an image.
A very powerful microscope that uses beams of electrons focused by electron lenses instead of light
An electron microscope uses electrons instead of electromagnetic waves (microwave radiation, visible light, UV-radiation, x-rays) to display the sample surface. A microscope's resolution depends on the wavelength. The shorter the wavelength the higher the resolution, that's why the resolution of an EM is distinctly better (0.1 nm) than the one of a light-optical microscope (200nm). The electrons are generated by a cathode and then accelerated towards a ring-shaped anode that is situated around the axis of radiation. The electrons are directed by a system of magnetic or electrostatic lenses, analogously to the light-optical microscope, to the sample where they are scattered; adjacently they are registered by a detector. As molecules would scatter the electrons, it is necessary that the microscope is in vacuum. Due to the bombardment of the surface with charged particles, the sample has to be conductive and grounded in order to avoid charging effects.
The electron microscope is a type of microscope that uses electrons to create an image of the target. It has much higher magnification or resolving power than a normal light microscope, up to two million times, allowing it to see smaller objects and details.