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clear;
clc;
printf("\nEx2.1\n");
//page no.-55
//given
h=6.60*10^-34;...........//planck's constant in J-s
m=1.674*10^-27;.........//mass of neutron in Kg
lambda=10^-10;...........//wavelength in m
e=1.6*10^-19;.............//charge
//We know lambda=h/sqrt(2*m*E)
E=(h^2)/(2*m*lambda^2*e)............//energy of neutron in eV
//to convert into eV divide by e,1.6*10^-19
printf("\nenergy of neutron is 8.12*10^-2 eV\n");
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