Classical Vs. Relativistic Electron

%% Classical Versus Relativistic Electron
% Determines the final velocity of electrons using classical and
% relativistic mechanics

% Constants
c = 3.00*10^8;                  % [m/s] Speed of Light
M0c2 = 511;                     % [KeV] Rest energy of electron
M0 = 9.11*10^-31;               % [kg] Rest nass of electron
Echarge = 1.6022*10^-19;        % [C]

% Inputs and Variables
d = input('Distance between plates\n');
V = input('Voltage difference kV\n');

% Outputs and Equations
BetaClass = sqrt(2*V/M0c2);
BetaRela = sqrt(1-(M0c2/(M0c2+V))^2);
fprintf('Classical: %.3f \nRelativistic: %.3f\n', BetaClass, BetaRela)