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+//Example 27.2
+//Also see Example 27.1
+d=0.01*10^-3;//Distance between slits (m)
+theta=90;//Maximum diffraction angle (deg)
+lambda=633*10^-9;//Wavelength (m)
+m=d*sind(theta)/lambda;//Order of interference
+printf('Maximum order of interference = %d',m)
+//Openstax - College Physics
+//Download for free at http://cnx.org/content/col11406/latest