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+clc;clear;
+//Example 8.5
+
+//given data
+V=30000;//potential difference in V
+Wmin=0.414*10^-10;//short wavelength limit in m
+e=1.602*10^-19;//the charge on electron in C
+c=3*10^8;//speed of light in m/s
+
+//calcualtions
+h=(e*V*Wmin)/c;
+disp(h,'The Plancks const in Js') \ No newline at end of file