// Additional solved examples , Example 11 , pg 335
c=3*10^8 //speed of light(in m/sec)
h=6.625*10^-34//planck's constant(in  J s)
lam=1.4*10^-10//wavelength(in m)
E=(h*c)/(lam*1.6*10^-19)  //energy of photon(in eV)
p=h/lam  //momentum of photon
printf("Energy of photo\n")
printf("E=%.1f eV\n",E)
printf("momentum of photon(in Kg m/sec)\n")
disp(p)