| Date 06/09/2010 |
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| Script S5_2_17.m | |||
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%===============================================
%Fresnel zones 1 %=============================================== % %lambda in mm lambda=0.5e-3 %distance a in mm a=700 b=359.74 % %we assume R1=2mm e R2=4mm R1=2 R2=4 %area of the annular surface S=pi*(R2^2-R1^2) %area of a zone num1=a+b; den1=a*b; G=num1/den1; Az=pi*lambda/G %the number N of zones N=S/Az %relative intensity of the spot on P IntAz=(Az/S)^2 denN=N^2; IntN=1/denN %more accurate values for R1 and R2 N1max=(G/lambda)*(R1^2) N2max=(G/lambda)*(R2^2) Deltam=(G/lambda)*(R2^2-R1^2) R1true=sqrt(33*lambda/G) R2true=sqrt(134*lambda/G) %=============================================== % |
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