Look up form factor in Wiktionary, the free dictionary.

Form factor may refer to:

• Form factor (radiative transfer) or emissivity, the proportion of energy transmitted by that object which can be transferred to another object
• Form factor (physics), a semi-empirical formula used in effective quantum field theories
• Form factor (electronics), an alternating current waveform
• Electric form factor, the Fourier transform of electric charge distribution in space
• Magnetic form factor, the Fourier transform of an electric current distribution in space
• Atomic form factor, or atomic scattering factor, is a measure of the amplitude of a wave scattered from an isolated atom
• The geometry of an object, especially in industrial and engineering design, including:
  • Computer form factor, the physical dimensions of the major components of computers
  • Hard disk drive form factor, the physical dimensions of a computer hard drive
  • Hard disk enclosure form factor, the physical dimensions of a computer hard drive enclosure
  • Mobile phone form factor, which describes the fundamental design of a mobile phone

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