1000 Solved Problems in Modern Physics

(Grace) #1

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/c

T=

P^2

2 M

=

c^2 p^2
2 Mc^2

=

202

(2)(940)

= 0 .21 MeV
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