initial commit / add all books

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diff --git a/3411/CH1/EX1.3.u1/Ex1_3_u1.sce b/3411/CH1/EX1.3.u1/Ex1_3_u1.sce
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+//Example 1_3_u1

+clc();

+clear;

+//To compare the intensity at a point distance 1mm from the center to that at its center and to find minimum dist from center of point 

+//Path difference=(Y*d)/D

+y=1     //units in mm

+y=y*10^-3     //units in mts

+D=1      //units in mts

+d=1     //units in mm

+d=d*10^-3      //units in mts

+pathdifference=(y*d)/D         //units in mts

+lamda=5893     //units in armstrongs

+lamda=lamda*10^-10    //units in mts

+phasedifference=(2*pathdifference)/lamda           //units in pi radiand

+ratioofintensity=(cos((phasedifference/2)*%pi))^2   //units in 

+printf("The ratio of intensity with central maximum is %.4f\n",ratioofintensity)

+pathdifference=lamda/4

+distance=(pathdifference*D)/d        //units in mts

+printf("The Distance of the point on the screen from center is %fmts",distance)

diff --git a/3411/CH1/EX1.3.u1/Ex1_3_u1.txt b/3411/CH1/EX1.3.u1/Ex1_3_u1.txt
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+The ratio of intensity with central maximum is 0.3363

+The Distance of the point on the screen from center is 0.000147mts 
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