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Optical diffraction

  1. Apr 20, 2005 #1
    hi to all,

    question is the following:

    the equation for optical diffraction due to diffraction grating is written as:

    if the incident light beam is not perpendicular to the grooves, the equation becomes

    G*m*lamda=(sin(a)+sin(b)) * cos(e)

    where e is the angle between the incident light path and the plane perpendicular to the grooves at the grating center.

    If incident light beam is not perpendicular, does this effect the diffraction efficiency? if yes, what is the equation?

  2. jcsd
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