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  • Chemiluminescence - Definition and Applications
    Article - 1 May 2014
    Chemiluminescence is the process of generating electromagnetic radiation by releasing energy as a result of a chemical reaction.
  • Bragg Mirrors - Definition and Applications
    Article - 15 May 2014
    A Bragg mirror, also known as a dielectric mirror, is a kind of mirror made up of alternating thin optical layers of two different materials. A quarter-wave mirror is the most commonly used Bragg...
  • What is a Folded Resonator?
    Article - 6 Aug 2014
    A folded resonator is a type of resonator construction in which the interior optical path is bent with the help of mirrors.
  • What are Wave Optics?
    Article - 8 Sep 2014
    Wave optics, also referred to as physical optics, is the branch of optics that enables important phenomena such as interference, diffraction, and polarization to be understood.
  • Speckle Pattern - Introduction and Applications
    Article - 15 May 2014
    Speckle pattern is a random granular pattern produced by the reflection of coherent light beam e.g. laser, at a rough surface such as a metallic surface, a display screen, white paint or a piece of...
  • Refractometer - Definition and Applications
    Article - 6 May 2014
    A refractometer is an optical device used for measuring the extent to which light is bent or refracted when it moves through a substance.
  • What are Photons?
    Article - 15 Sep 2014
    The term photon was coined by Gilbert Lewis in 1926. A photon is a type of elementary particle that forms the basic unit of electromagnetic radiation, which includes infrared, ultraviolet, visible...
  • Fizeau Interferometer - Definition and Applications
    Article - 1 May 2014
    Interferometric measurements can be carried out in an optical arrangement in which two or more beams originated from the same source, but passing in different paths are made to interfere....
  • Astigmatism in Optical Systems
    Article - 1 May 2014
    An optical system that is plagued with astigmatism focuses two orthogonal axes of light at two different distances.
  • What is Raman Amplification?
    Article - 11 Jul 2013
    Raman amplification is a phenomenon in non-linear optical mediums where the transfer of power from one optical beam to another happens when it is downshifted in frequency by the energy from an optical...

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