//chapter27
//example 9
clc
//given
e=1.6*10^-19 //charge in coul
E=1.2*10^4 //electric field in nt/coul
x=1.5*10^-2 //length of deflecting assembly in m
K0=3.2*10^-16 //kinetic energy of electron in joule
//calculation
y=e*E*x^2/(4*K0)
disp(y,"Corresponding deflection in meters is")