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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 7.1
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given
+D=1e9;//Specific detectivity of detector in m Hz^(1/2) W^(-1)
+Lambda=2e-6;//Wavelength in m
+A=25e-6//Detector area in m^2
+Deltaf=10e3;//Detection bandwidth in Hz
+
+NEP=sqrt(A*Deltaf)/D;//Detector sensitivity in W
+mprintf("\n NEP = %.1e W",NEP);