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    What is Rayleigh criteria of resolution? What is Resolving power of grating?
    written 4.5 years ago by gravatar for Pooja Joshi Pooja Joshi • 2.5k •   modified 4.5 years ago

    Mumbai university > FE > SEM 2 > Applied Physics II

    Marks: 3M

    Year: May 2014
    mumbai university applied physics 2 • 12k  views
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    written 4.5 years ago by gravatar for Pooja Joshi Pooja Joshi • 2.5k

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    Rayleigh’s criteria states that the two point sources of light are said to be just resolved it the first minima of one point source corresponds with the central maxima of other source.

    The resolving power of grating is given by

    $R.P = \frac{λ}{dλ} = mN$

    Where,

    λ is the wavelength of light

    dλ is the minimum distance difference of wavelength that can be resolved

    m is the order of spectra

    N is no. of lines in grating
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