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Results 2551 - 2560 of 2668 for Physics
  • Phase-Contrast Microscope - Definition and Applications
    Article - 6 May 2014
    Phase-contrast microscope is a type of light microscopy that intensifies contrasts of transparent and colorless objects by influencing the optical path of light. Phase-contrast microscopy is an...
  • What is Optical Parametric Amplification (OPA)?
    Article - 6 May 2014
    Optical parametric amplification (OPA) may be described as a process of amplifying an input signal in the presence of a higher-frequency pump wave. Apart from signal amplification, an idler wave is...
  • Multi-Photon Absorption - Non-Linear Spectroscopy
    Article - 15 Aug 2013
    Multi-photon absorption is a technique that is widely used in atomic and molecular physics to determine the properties of materials.
  • What is Four-Wave Mixing?
    Article - 1 Oct 2014
    Four-wave mixing (FWM) is a non-linear optical process where two other waves are produced by the interaction of two wavelengths. Four-wave mixing can take place in any kind of material.
  • What is Spontaneous Parametric Down Conversion?
    Article - 31 Oct 2014
    Spontaneous parametric down conversion is as an optical quantum process in which an incident photon is converted into pairs of entangled photons by a non-linear medium.
  • Xenon Arc Lamps - White Light for Photometry and Microscopy
    Article - 24 Jul 2013
    A xenon arc lamp is a specialized gas discharge lamp that emits light when electricity is passed through ionized xenon gas that is maintained at high pressure. Xenon gas is ionized by electric...
  • What is a Dichroic Filter?
    Article - 24 Jul 2013
    Dichroic filters are filters that optic filters that are placed at an angle of 45° to the light source, causing the light to travel in a different direction. Dichroic is a Greek word meaning...
  • What is a Photomultiplier?
    Article - 8 Jul 2013
    Photomultipliers or photomultiplier tubes (PMTs) belong to a class of vacuum tubes that convert photons into electric signal. PMTs are known for their ultra-fast response and high sensitivity. They...
  • What is a Diffraction Grating?
    Article - 18 Jun 2013
    Diffraction grating comes into the picture when there is a need for separate light of different wavelengths with high resolution. A diffraction grating is a multiple slit arrangement made by etching...
  • Gold Vapor Lasers - Properties and Applications
    Article - 24 Jul 2013
    The gold vapor laser is very similar to copper vapor laser in terms of structure and operation as well.

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