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Ray-Ban is a brand of luxury sunglasses and eyeglasses created in 1936 by Bausch & Lomb. The brand is best known for its Wayfarer and Aviator lines of sunglasses.
A cathode-ray tube(CRT) is a vacuum tubecontaining one or more electron guns, which emit electronbeams that are manipulated to display images on a phosphorescentscreen.[2] The images may represent electrical waveformson an oscilloscope, a frameof videoon an analogtelevision set(TV), digitalraster graphicson a computer monitor, or other phenomena like radartargets. A CRT in a TV is commonly ...
Titanium dioxide, also known as titanium (IV) oxide or titania / taɪˈteɪniə /, is the inorganic compound derived from titanium with the chemical formula TiO2. When used as a pigment, it is called titanium white, Pigment White 6 ( PW6 ), or CI 77891. [4] It is a white solid that is insoluble in water, although mineral forms can appear black.
Optical tweezers (originally called single-beam gradient force trap) are scientific instruments that use a highly focused laser beam to hold and move microscopic and sub-microscopic objects like atoms, nanoparticles and droplets, in a manner similar to tweezers. If the object is held in air or vacuum without additional support, it can be called optical levitation .
Metallography is the study of the physical structure and components of metals, by using microscopy . Ceramic and polymeric materials may also be prepared using metallographic techniques, hence the terms ceramography, plastography and, collectively, materialography.
A scanning transmission electron microscope ( STEM) is a type of transmission electron microscope (TEM). Pronunciation is [stɛm] or [ɛsti:i:ɛm]. As with a conventional transmission electron microscope (CTEM), images are formed by electrons passing through a sufficiently thin specimen. However, unlike CTEM, in STEM the electron beam is focused to a fine spot (with the typical spot size 0.05 ...
Hot cathode. A tungsten filament acting as a directly heated cathode in a low pressure mercury gas discharge lamp which emits electrons. To increase electron emission, a white thermionic emission mix coating is applied on hot cathodes, visible on the central portion of the coil. Typically made of a mixture of barium, strontium, and calcium ...
A scanning tunneling microscope ( STM) is a type of scanning probe microscope used for imaging surfaces at the atomic level. Its development in 1981 earned its inventors, Gerd Binnig and Heinrich Rohrer, then at IBM Zürich, the Nobel Prize in Physics in 1986. [1] [2] [3] STM senses the surface by using an extremely sharp conducting tip that can distinguish features smaller than 0.1 nm with a ...