130 2 Quantum Mechanics – I
This value is in agreement with 13.60 obtained from Bohr’s theory of hydro-
gen atom.2.86 (i)ΔxΔPx=(ii)ΔEΔt=
ΔPx=Δx;cΔPx=cPx=c
Δx=
197 .3MeV−fm
10 fm≈20 MeV/cT=
P^2
2 M
=
c^2 p^2
2 Mc^2=
202
(2)(940)
= 0 .21 MeV