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Determine the Fresnel distance if the aperture is of the size 1cm and the wavelength is 500nm

Wavelength, λ = 500nm

Aperture size, a = 1cm

\(z= frac{a^{2}}{lambda }\)

\(z=frac{1times 10^{-2}1times 10^{-2}}{500times 10^{-9}}\)

\(z=frac{1000}{5}\)

z = 200m

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