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Glossary of Physics Terms
beginning with letter F
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F
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noun
  1. The sixth letter of the Appendix:Roman script, English alphabet, preceded by E and followed by G.
  2. A failing grade in a class or course. The next best grade is a D. Some institutions issue Es instead of Fs.
Fahrenheit
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adjective
  1. A temperature scale originally defined as having 0 °F as the lowest temperature obtainable with a mixture of ice and salt, and 96 °F as the temperature of the human body, and now defined with 32 °F equal to 0 °C, and each degree Fahrenheit equal to 5/9 of a degree Celsius or 5/9 kelvin.
fermion
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noun
  1. (particles) A particle with totally antisymmetric composite quantum states, which means they must obey the Pauli exclusion principle, and that obey Fermi-Dirac statistics. They have half-integer spin. Among them are many elementary particles, most derived from quarks. Compare boson.
ferrimagnetic
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adjective (wikipedia, ferrimagnetic interaction)
  1. (physics) exhibiting ferrimagnetism
ferroelectric
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noun
  1. A ferroelectric material
adjective (wikipedia, ferroelectric effect)
  1. (physics) of, or relating to the permanent electrical polarization of a crystalline dielectric in an electric field
ferromagnet
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noun
  1. a ferromagnetic material
  2. a magnet made from such material
ferromagnetic
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adjective
  1. (physics) of a material, such as iron or nickel, that is easily magnetized
fertile
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adjective
  1. (context, of land etc) capable of growing abundant crops; productive
  2. (biology) capable of reproducing; fecund, fruitful
  3. (biology) capable of developing past the egg stage
  4. (context, of an imagination etc) productive or prolific
Feynman diagram
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noun
  1. (physics) a pictorial representation of the interactions of subatomic particles, showing their paths in space and time as lines, and their interactions as points where lines meet
field
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noun
  1. A land area free of woodland, cities, and towns; open country.
  2. A wide, open space that is usually used to grow crops or to hold farm animals.
  3. The open country near or belonging to a city -- usually used in plural.
  4. (physics) A region affected by a particular force.
magnetic field
  1. A course of study or domain of knowledge or practice.
  2. (mathematics) A set having two operations called addition and multiplication under both of which all the elements of the set are commutative and associative; for which multiplication distributes over addition; and for both of which there exist an identity element and an inverse element.
The set of rational numbers, <math>\mathbb{Q}</math>, is the prototypical field.
  1. (sport) An area reserved for playing a game.
soccer field
  1. (geology) A region containing a particular mineral.
oil field or oilfield
gold field or goldfield
  1. (heraldry) The background of the shield
  2. (computing) An area of memory or storage reserved for a particular value.
verb
  1. (context, transitive, sport) To intercept or catch (a ball) and play it.
  2. (context, transitive, sport) To place a team in (a game).
  3. (transitive) To answer, accept or address.
She will questions immediately after her presentation.
field emission
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noun
  1. (physics) the emission of electrons from a metal or semiconductor, under the influence of a strong electric field, by quantum tunneling
fireball
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noun
  1. A ball of fire.
  2. An explosion, which results in a fireball.
  3. (astronomy) A meteor bright enough to cast shadows.
  4. A class of sailing dinghy,with a single trapeze and a symmetrical spinnaker, sailed by a crew of two.
fission
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noun
  1. The process whereby one item splits to become two.
  2. (physics): The process of splitting an atom into smaller particles.
  3. (biology): The process by which a bacterium splits to form two daughter cells.
fissionable
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adjective
  1. Capable of undergoing nuclear fission; fissile.
flavor
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noun (plural: flavors)
  1. The quality produced by the sensation of taste.
The of this apple pie is delicious.
  1. A substance used to produce a taste. Flavoring.
Flavor was added to the pudding.
  1. A variety of tastes attributed to an object.
What of bubble gum do you enjoy?
  1. The characteristic quality of something.
the of an experience
  1. A type of something.
His favorite of ...
  1. (physics) a term used to name the six types of quarks (top, bottom, strange, charmed, up, and down) or three types of leptons (electron, muon, and tauon).
(wikipedia, Flavour (particle physics))
flow
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noun
  1. The movement of a fluid.
  2. The rising movement of the tide.
  3. smoothness, Smoothness or continuity.
The room was small, but it had good symmetry and .
  1. The amount of a fluid that moves or the rate of fluid movement.
Turn on the valve and make sure you have sufficient .
  1. (psychology) the state of be at one with, being at one with.
verb
  1. (intransitive) To move as a fluid from one position to another.
  2. (intransitive) To move or match smoothly, gracefully, or continuously.
The writing is grammatically correct, but it just doesn't .
focus
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noun (foc, i , - , pl2=focuses)
  1. (countable) (optics) a point at which reflected or refracted rays of light converge.
The heat of sunlight at the of a magnifying glass can easily set dry leaves on fire.
  1. (countable) (geometry) a point of a conic at which rays reflected from a curve or surface converge.
  2. (uncountable) (photography, cinematography) The fact of the convergence of light on the photographic medium.
Unfortunately, the license plate is out of in this image.
  1. (uncountable) (photography, cinematography) The quality of the convergence of light on the photographic medium.
During this scene, the boy"s face shifts subtly from soft into sharp .
  1. (uncountable) concentration of attention.
I believe I can bring the high degree of required for this important job.
  1. (countable) the exact point of where an earthquake occurs, in three dimensions.
The earthquake's was at exactly 37 degrees north, 18 degrees south, seventy five meters below the ground.
verb (focuses or, less commonly, focusses, focusing or, less commonly, focussing, focused or, less commonly, focussed)
  1. (transitive) To cause (rays of light, etc) to converge at a single point.
  2. (transitive) To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.
You'll need to the microscope carefully in order to capture the full detail of this surface.
  1. (transitive) (followed by on or upon) To concentrate one's attention.
Focus on passing the test.
  1. (transitive) To make (a liquid) less diluted.
  2. (intransitive) To concentrate one"s attention.
If you're going to beat your competitors, you need to .
foot-pound-second
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noun (plural foot-pound-seconds)
  1. A unit of mechanical power, equal to that required to raise one pound through a distance of one foot in one second.
adjective (pos=foot-pound-second, -)
  1. Of or relating to a measurement system that uses the foot as a measure of distance, the pound as a measure of force, and the second as a measure of time. Abbreviations: ft-lb-s, fps, f.p.s.
forbidden
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verb
  1. (past participle of, forbid)
adjective
  1. not allowed
frame of reference
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noun
  1. a set of assumptions, ideas and standards that form a viewpoint from which philosophical, religious and other ideas may be evaluated
  2. (physics) a set of axes which enable an observer to measure the position and motion of all bodies in some system relative to the reference frame
freeze
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noun
  1. A period of intensely cold weather.
  2. (curling) A precise draw weight shot where a delivered stone comes to a stand-still against a stationary stone, making it nearly impossible to knock out.
  3. (finance) A block on pay rises
verb (freezes, freezing, froze or rarely frore, frozen or rarely froren)
  1. (intransitive) To drop to a temperature below zero degrees celsius, where water turns to ice.
    • It didn't this winter, but last winter was very harsh.
      1. (context, intransitive, informal) To be very cold.
    • It's freezing in here!
      1. (intransitive) Especially of a liquid, to become solid due to low temperature.
    • The pond has frozen over.
    • Vodka won't in there, but beer will.
      1. (transitive) To lower something's temperature to the point that it freezes or becomes hard.
    • Don't meat twice.
      1. (intransitive) To become motionless.
    • The squirrel froze when it saw the hawk overhead.
fundamental
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noun
  1. A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; essential part, as, the fundamentals of the Christian faith.
adjective
  1. Pertaining to the foundation or basis; serving for the foundation. Hence: Essential, as an element, principle, or law; important; original; elementary; as, a fundamental truth; a fundamental axiom.
fusion
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noun
  1. The act of melting or to liquify something by heating it
  2. The merge, merging of similar or different elements into a union
  3. (physics) A nuclear reaction in which nuclei combine to form more massive nuclei with the concomitant release of energy
  4. Music that blends disparate genres; especially types of jazz
  5. A style of cooking that combines ingredients and techniques from different countries or cultures
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