initial commit / add all books

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diff --git a/24/CH37/EX37.5/Example37_5.sce b/24/CH37/EX37.5/Example37_5.sce
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+exec('degree_rad.sci', -1)

+

+//Given that

+N = 1.26*10^4

+w = 25.4*10^-3  //in meter

+l1 = 589*10^-9  //in meter

+l2 = 589.59*10^-9  //in meter

+

+//Sample Problem 37-5a

+printf("**Sample Problem 37-5a**\n")

+d = w/N

+m = 1

+theta = asin(m*l1/d)

+theta = rtod(theta)

+printf("The first order maxima occurs at an angle of %fdegree from the center\n", theta)

+

+//Sample Problem 37-5b

+printf("\n**Sample Problem 37-5b**\n")

+theta = rtod(theta)

+D = m/(d*cos(theta))

+deltaL = l2-l1

+deltaTHETA = D*deltaL

+printf("The anglar sepration between the two first orderlines is %erad\n", deltaTHETA)

+

+//Sample Problem 37-5c

+printf("\n**Sample Problem 37-5c**\n")

+Lavg = (l1+l2)/2

+R = Lavg/(m*deltaL)

+N = R/m

+printf("The least number of rulings a grating can have is %d", N)
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diff --git a/24/CH37/EX37.5/Example37_5_result.txt b/24/CH37/EX37.5/Example37_5_result.txt
new file mode 100755
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+++ b/24/CH37/EX37.5/Example37_5_result.txt
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+**Sample Problem 37-5a**

+The first order maxima occurs at an angle of 16.988581degree from the center

+

+**Sample Problem 37-5b**

+The anglar sepration between the two first orderlines is 3.372079e-004rad

+

+**Sample Problem 37-5c**

+The least number of rulings a grating can have is 998
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