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For what distance is ray optics a good approximation when the aperture is 3 mm wide and the wavelength is 500 nm ? |
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Answer» Solution :For distance `Z lt= Z_F`ray optics is the good APPROPRIATE Fresnel distance `Z_F = (a^2)/(LAMDA) = ((3 xx 10^(-3))^2)/(5 xx 10^(-7)) = 18M` |
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