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Online Physics Glossary
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Word Meaning Remarks
Factor-label method Dimensional analysis.
Farad Unit of capacitance. One coulomb per volt.
Ferromagnetic materials Materials in which large internal magnetic fields are generated by cooperative action of electrons.
First harmonic In music, the fundamental frequency.
First law of thermodynamics Change in internal or thermal energy is equal to heat added and work done on system. Same as law of conservation of energy.
Fluid Material that flows, i.e. liquids, gases, and plasmas.
Focal length Distance from the focal point to the center of a lens or vertex of a mirror.
Focal point Location at which rays parallel to the optical axis of an ideal mirror or lens converge to a point.
Forbidden gap Energy values that electrons in a semiconductor or insulator may not have.
Force Agent that results in accelerating or deforming an object.
Frame of reference Coordinate system used to define motion.
Fraunhofer lines Absorption lines in the sunís spectrum due to gases in the solar atmosphere.
Frequency Number of occurrences per unit time.
Friction Force opposing relative motion of two objects are in contact.
Fundamental particles Those particles( i.e. quarks and leptons) of which all materials are composed.
 
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