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+//chapter 45
+//example 2
+//given
+//clc()
+m=1
+lambda=5890//in A
+d=25400//in A
+theta=asind((m*lambda)/d)
+disp("solution (a)")
+disp(theta,"The first order diffraction pattern in degree=")
+disp("solution (b)")
+//given
+del_lambda=5.9//in A
+delta_theta=(m*(del_lambda))/(d*cosd(theta))
+disp(delta_theta,"Angle of seperation in degree=")
+\ No newline at end of file