initial commit / add all books

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+clc

+//to calculate values of lambda1 and lambda2

+//in fraunhofer diffraction pattern ,the direction of minima is given by e*sintheta=+m*lambda,where m=1,2,.......

+//direction of fourth minima (m=4) for wavelength lambda1 is given by e*sintheta1=4*lambda1..........eq(1)

+//similarly, e*sintheta2=5*lambda2..........eq(2)

+//from eq(1) and eq(2),we get e*sintheta=4*lambda1=5*lambda2....eq(3)

+y=0.5            //in cm

+f=100             //in cm

+theta=y/f                 //in radian

+sintheta=theta //theta is very small

+e=0.05       //width of slit in cm

+lambda1=e*sintheta/4

+disp("lambda1="+string(lambda1)+"cm")

+//from eq(3) we get,

+lambda2=4*lambda1/5

+disp("lambda2="+string(lambda2)+"cm")