luu (nml299) – HW10 – markert – (58710)
1
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23
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001
10.0 points
If the momentum of an electron doubles, by
what factor would its de Broglie wavelength
be multiplied?
1.
λ
′
λ
=
1
4
2.
λ
′
λ
= 1
3.
λ
′
λ
= 2
4.
λ
′
λ
=
1
2
5.
λ
′
λ
= 4
002
10.0 points
One electron travels twice as fast as another.
Which has longer wavelength?
1.
The two have the same wavelength.
2.
The slower one
3.
More information is needed.
4.
The faster one
003
10.0 points
Suppose optical radiation ( of wavelength 6
×
10
−
7
m) is used to determine the position of
an electron to within the wavelength of the
light.
The
mass
of
an
electron
is
9
.
10939
×
10
−
31
kg
and
the
Planck’s
constant
is
6
.
62607
×
10
−
34
J
·
s.
What will be the minimum resulting uncer
tainty in the electron’s velocity?
Answer in
units of m
/
s.
004
10.0 points
A 74
.
1 g ball moves at 38
.
8 m
/
s.
If its speed is measured to an accuracy of
0
.
16%, what is the minimum uncertainty in
its position? Answer in units of m.
005
(part 1 of 2) 10.0 points
In the diagram, the energy difference between
states A and B is twice the energy difference
between states B and C. In a transition (quan
tum jump) from C to B an electron emits a
photon of wavelength 600 nm.
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 Spring '09
 MARKERT
 Atom, Kinetic Energy, Photon, Light, Fundamental physics concepts

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