Vacuum
Vacuum is space that is devoid of matter. The word stems from the Latin adjective vacuus for "vacant" or "void". An approximation to such vacuum is a region with a gaseous pressure much less than atmo...
Vacuum - Wikipedia
Brian Cox visits the world's biggest vacuum chamber
Brian Cox visits NASA’s Space Power Facility in Ohio to see what happens when a bowling ball and a feather are dropped together under the conditions of outer space...
Physicist Tests Theories Of Dark Energy By Mimicking The Vacuum Of Space
Besides the atoms that make up our bodies and all of the objects we encounter in everyday life, the universe also contains mysterious dark matter and dark energy. The latter, which causes galaxies to ...
Documentary On Top Secret Antigravity Vehicle Released
July 30, 2015 - A documentary on the alleged true story of a man who believes he gained inside knowledge about a top secret antigravity spaceship has recently been released, despite the death of the m...
NASA Just Released Breathtaking New Photos of Outer Space That Will Blow Your Mind
Shining a spotlight on parts of the universe we've never seen before.
Quantum scientists create light from vacuum
Scientists at Chalmers have succeeded in creating light from vacuum – observing an effect first predicted over 40 years ago. The results have been published in the journal Nature. In an innovative exp...
Vacuum pump
A vacuum pump is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded ...
Vacuum pump - Wikipedia
Ultra-high vacuum
Ultra-high vacuum is the vacuum regime characterised by pressures lower than about 10 pascal or 100 nanopascals (10 mbar, ~10 torr). UHV requires the use of unusual materials for equipment, and heatin...
Outgassing
Outgassing (sometimes called offgassing, particularly when in reference to indoor air quality) is the release of a gas that was dissolved, trapped, frozen or absorbed in some material. Outgassing can ...
Vacuum deposition
Vacuum deposition is a family of processes used to deposit layers of material atom-by-atom or molecule-by-molecule on a solid surface. These processes operate at pressures well below atmospheric press...
Vacuum tube
In electronics, vacuum tube, electron tube (in North America), tube, or valve (in British English) is a device that controls electric current through a vacuum in a sealed container.Vacuum tubes mostly...
Vacuum tube - Wikipedia
QCD vacuum
The QCD vacuum is the vacuum state of quantum chromodynamics (QCD). It is an example of a non-perturbative vacuum state, characterized by infinitely many non-vanishing condensates such as the gluon co...
QED vacuum
The quantum electrodynamic vacuum or QED vacuum is the field-theoretic vacuum of quantum electrodynamics. It is the lowest energy state (the ground state) of the electromagnetic field when the fields ...
QED vacuum - Wikipedia
Vacuum state
In quantum field theory, the vacuum state (also called the vacuum) is the quantum state with the lowest possible energy. Generally, it contains no physical particles. Zero-point field is sometimes use...
Zero-point energy
Zero-point energy, also called quantum vacuum zero-point energy, is the lowest possible energy that a quantum mechanical physical system may have; it is the energy of its ground state. All quantum mec...
Superfluid vacuum theory
Superfluid vacuum theory (SVT), sometimes known as the BEC vacuum theory, is an approach in theoretical physics and quantum mechanics where the fundamental physical vacuum (non-removable background) i...
Virtual particle
In physics, a virtual particle is an explanatory conceptual entity that is found in mathematical calculations about quantum field theory. It refers to mathematical terms that have some appearance of r...
Vacuum energy
Vacuum energy is an underlying background energy that exists in space throughout the entire Universe. One contribution to the vacuum energy may be from virtual particles which are thought to be partic...
Vacuum genesis
Vacuum genesis (zero-energy universe) is a scientific theory about the Big Bang that states that the universe began as a single particle arising from an absolute vacuum, similar to how virtual particl...
Vacuum polarization
In quantum field theory, and specifically quantum electrodynamics, vacuum polarization describes a process in which a background electromagnetic field produces virtual electron–positron pairs th...
Documentary On Top Secret Antigravity Vehicle Released
July 30, 2015 - A documentary on the alleged true story of a man who believes he gained inside knowledge about a top secret antigravity spaceship has recently been released, despite the death of the m...
NASA Just Released Breathtaking New Photos of Outer Space That Will Blow Your Mind
Shining a spotlight on parts of the universe we've never seen before.
EL34
The EL34 is a thermionic valve or vacuum tube of the power pentode type. It has an international octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of ...
EL34 - Wikipedia
6SN7
6SN7 is a dual triode vacuum tube with an 8-pin octal base. It provided a medium gain (20). Note that ‘6SN7’ is not an actual tube designation but indicates a family of tubes such as 6SN7-GT... the 6S...
6SN7 - Wikipedia
EL84
The EL84 is a thermionic valve of the power pentode type. It has a 9 pin Noval base and is used mainly in the power output stages of audio amplification circuits, most commonly now in guitar amplifier...
EL84 - Wikipedia
5Y3
The 5Y3 is a medium-power directly heated full-wave rectifier vacuum tube introduced by RCA in 1935. It has found wide use in tube radios and early guitar amplifiers (of the Fender Champ type). It ...
5Y3 - Wikipedia
6P14P
The EL84 is a thermionic valve of the power pentode type. It has a 9 pin Noval base and is used mainly in the power output stages of audio amplification circuits, most commonly now in guitar amplifier...
6P14P - Wikipedia