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  2. Eddy-current testing - Wikipedia

    en.wikipedia.org/wiki/Eddy-current_testing

    This wire coil produces an alternating magnetic field around itself. The magnetic field oscillates at the same frequency as the current running through the coil. When the coil approaches a conductive material, currents opposite to the ones in the coil are induced in the material — eddy currents. [4]

  3. Photoacoustic spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Photoacoustic_spectroscopy

    Photoacoustic spectroscopy is the measurement of the effect of absorbed electromagnetic energy (particularly of light) on matter by means of acoustic detection. The discovery of the photoacoustic effect dates to 1880 when Alexander Graham Bell showed that thin discs emitted sound when exposed to a beam of sunlight that was rapidly interrupted with a rotating slotted disk.

  4. Inductively coupled plasma atomic emission spectroscopy

    en.wikipedia.org/wiki/Inductively_coupled_plasma...

    The output or "work" coil of the radio frequency (RF) generator surrounds part of this quartz torch. Argon gas is typically used to create the plasma. The ICPs have two operation modes, called capacitive (E) mode with low plasma density and inductive (H) mode with high plasma density, and E to H heating mode transition occurs with external ...

  5. Photoacoustic effect - Wikipedia

    en.wikipedia.org/wiki/Photoacoustic_effect

    Photoacoustic spectroscopy is also useful for the opposite case of opaque samples, where the absorption is essentially complete. In an arrangement where a sensor is placed in a gaseous phase above the sample and the light impinges the sample from above, the photoacoustic signal results from an absorption zone close to the surface.

  6. Multispectral optoacoustic tomography - Wikipedia

    en.wikipedia.org/wiki/Multispectral_optoacoustic...

    The amplitude of the pressure wave provides information about the local absorption and propagation of energy in the sample, while the time interval between the illumination pulse and arrival of the ultrasound wave at the detector provides information about the distance between the detector and photoecho source. Optoacoustic data collected over ...

  7. Conversion electron Mössbauer spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Conversion_electron...

    Conversion electron Mössbauer spectroscopy (CEMS) is a Mössbauer spectroscopy technique based on conversion electron.. The CEM spectrum can be obtained either by collecting essentially all the electrons leaving the surface (integral technique), or by selecting the ones in a given energy range by means of a beta ray spectrometer (differential or depth selective CEMS).

  8. Monomolecular wire - Wikipedia

    en.wikipedia.org/wiki/Monomolecular_wire

    An early example of a material similar to monomolecular wire deliberately used as a weapon and cutting tool is "borazon-tungsten filament" in G. Randall Garrett's "Thin Edge". (Analog, Dec 1963) [4] The main character uses a strand from an asteroid towing-cable to cut jail bars and to booby-trap the door of his room.

  9. Photoacoustic imaging - Wikipedia

    en.wikipedia.org/wiki/Photoacoustic_imaging

    Photoacoustic imaging or optoacoustic imaging is a biomedical imaging modality based on the photoacoustic effect.Non-ionizing laser pulses are delivered into biological tissues and part of the energy will be absorbed and converted into heat, leading to transient thermoelastic expansion and thus wideband (i.e. MHz) ultrasonic emission.

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