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+// Scilab Code Ex8.8 Percentage transmitted energy of X-rays: Page 259 (2010)

+mu = 139;    // Attenuation co-efficient of aluminium, per metre

+x = 0.005;    // Thickness of aluminium sheet, m

+// If X% is the intensity of the X-ray transmitted through the aluminium sheet then

+// X% = I/I_0

+// or X/100 = exp(-absorb_coeff*x)

+// Solving for X

+X = 100*exp(-mu*x);    // Transmitted percentage of X-rays

+printf("\nThe intensity of the X-ray transmitted through the aluminium sheet = %g percent", round(X));

+// Result

+// The intensity of the X-ray transmitted through the aluminium sheet = 50 percent
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