The above does not mean that photon's position can never be specified;consider the case where one tries to find out which path a photon follows in the double slit experiment.In fact,the position measure-ment gives $\ x\ +\delta\ x\$ where $\delta\ x\sim\lambda\$ and cannot be made further less anyway whereas for massive particles,we just saw $\delta\ x\$ can be made $\ll\lambda_{deB}\$.If it were possible,$\delta\ p \gg\frac{\hbar}{\lambda}\ =\frac{\hbar\omega}{\ c}\$; i.e. $\delta\ p\sim\ p\gg\frac{\hbar\omega}{\ c}\$ which must be wrong.
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