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For what distance is ray optics a good approximation when the aperture is 3mm wide and the wavelength is 500 mn? |
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Answer» Solution :For distance `Z le Z_(F)`, RAY optics is the GOOD appropriate Fresnel distance `Z_(F)= (a^2)/(LAMBDA)= ((3xx10^(-3))^2)/(5xx 10^(-7))= 18m`. |
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