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function Solution
disp('---Question1----')
nus=8433;
h=6.62606957e-34; %m^2 kg/s
me=9.10938291e-31; %kgs
c=299792458; %speed of light in m/s
E=0.5:1:200; %in meV
Ep=0.5:1:55;   %in meV
%wave length in meters
lambdaElec=h./sqrt(2*0.26*me*E*10^(-3));
lambdaPhonon=h*nus./(Ep*10^(-3));
lambdaPhoton=h*c./(E*10^(-3));
%plots
subplot(1,3,1)
plot(E,1e9*lambdaElec)
xlabel('Energy (meV)')
ylabel('Wavelenghth Lambda (nm)')
title('Electron wavelength as a function of energy')
subplot(1,3,2)
plot(E,1e9*lambdaPhoton)...

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