Items

• oscilloscope

  An instrument in which the variations in a fluctuating electrical quantity appear temporarily as a visible wave form on a display screen
• overtone

  Any resonant frequency that is higher than the fundamental frequency of a vibrating object or sound source.
• oxidise

  To combine with oxygen; to remove one or more electrons from an atom, ion or molecule
• oxygen

  A chemical element with atomic number 8 that constitutes 21 percent of the Earth's atmosphere, that is capable of combining with all elements except some noble gases, that is active in physiological processes of almost all known organisms, and that is involved especially in combustion
• parabola

  A plane curve generated by a point moving so that its distance from a fixed point is equal to its distance from a fixed line : the intersection of a right circular cone with a plane parallel to an element of the cone
• parallel

  Extending in the same direction, everywhere equidistant
• paramagnetism

  Being or relating to a magnetizable substance (such as aluminum) that has small but positive susceptibility which varies little with magnetizing force
• parameter

  Any of a set of physical properties whose values determine the characteristics or behavior of something
• particle

  A relatively small or the smallest discrete portion or amount of something
• pattern

  Frequent or widespread incidence
• pendulum

  A body suspended from a fixed point so as to swing freely to and fro under the action of gravity and commonly used to regulate movements
• period

  A portion of time determined by some recurring phenomenon
• permeable

  Capable of being penetrated; having pores and openings that allow liquids or gases to go through
• permittivity

  The ability of a material to store electrical potential energy under the influence of an electric field measured by the ratio of the capacitance of a capacitor with the material as dielectric to its capacitance with vacuum as dielectric
• perpendicular

  Standing at right angles to the plane of the horizon : exactly upright
• phase

  The point or stage in a period of uniform circular motion, harmonic motion, or the periodic changes of any magnitude varying according to a simple harmonic law to which the rotation, oscillation, or variation has advanced from its standard position or assumed instant of starting
• phenomenon

  A fact or event of scientific interest susceptible to scientific description and explanation
• photoelectric

  Involving, relating to, or utilizing any of various electrical effects due to the interaction of radiation (such as light) with matter
• photon

  A quantity of electromagnetic radiation
• photosphere

  A sphere of light or radiance; The luminous surface layer of the sun or a star
• photovoltaic

  Of, relating to, or utilizing the generation of a voltage when radiant energy falls on the boundary between dissimilar substances (such as two different semiconductors)
• physics

  A science that deals with matter and energy and their interactions
• pion

  A meson that is a combination of up and down quarks and antiquarks, that may be positive, negative, or neutral, and that has a mass about 270 times that of the electron
• piston

  A sliding piece moved by or moving against fluid pressure which usually consists of a short cylindrical body fitting within a cylindrical chamber or vessel along which it moves back and forth
• pitch

  A property of a sound that is determined by the frequency of the waves producing it : highness or lowness of sound