Himanshi posted an Question
August 15, 2021 • 12:27 pm 30 points
  • IIT JAM
  • Physics (PH)

Why the wave is polarised along x axis and also why for attenuation of y component spacing between wires should be less than lambda

n this setion we hnearly polarized light wavex hods for produ ucing. 21.3.1 The Wire Grid Polarizer and the Polaroid The physies behind the working of the wite grd polarize NIobably the easiest to understand. It essentially consist of a large number of thin copper wires placed parallel cah other as shown inTig. 21.8. When an unpolarized eleu tromagnetic wave is incident on it, then the component the electric vector along the length of the wire is absorbe Emergent polarized wave ncident unpolarnzed

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    Bidyut sinha

    this is actually working of wave grid polarizer..For wire grid polarizer are made of fine metal wire and that are usually 100 nm to several microns..Its work depending on wave length range.. actually as it restrict s component of ELECTRIC FIELD, so its range should be less than wave length ..So that it could restrict s component... please check the attached picture

    cropped345008408.jpg
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    Bidyut sinha best-answer

    1) First of all , you have to know that "Along the line of wire, that is along the " PROPAGATION" , Polarisation does not occur. 2). Polarisation always occur perpendicular to the line of propagation. 4.Now according to picture, you have given, there "Propagation " is along z direction and "Polarisation will be perpendicular to that. 5.along z axis propagation occurs and Polarisation occurr in perpendicular xy plane... along x Electric field vector and Along y magnetic field.. 6. and for wave grid polarizer ,the spacing length is less than wave length. otherwise unpolarised wave can not propagate

    cropped1305241027.jpg
    eduncle-logo-app

    pls elaborate the last point why spacing should be less than lamba

    eduncle-logo-app

    this is actually working of wave grid polarizer..For wire grid polarizer are made of fine metal wire and that are usually 100 nm to several microns..Its work depending on wave length range.. actually as it restrict s component of ELECTRIC FIELD, so its range should be less than wave length ..So that it could restrict s component... please check the attached picture

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