A metal has work function 4 eV.
What is the kinetic energy of a photoelec-
tron if radiation of wavelength 200 nm falls
on the surface of the metal? The value of
h c
is 1240 eV
·
nm
.
What wavelength is emitted when the pho-
ton jumps from
B
to
A
?
Explanation:
In the Compton e
ff
ect, the photon loses
energy, so its frequency decreases.
012 (part 1 of 2) 10.0 points
In the diagram the energy di
ff
erence between
states
B
and
C
is twice the energy di
ff
erence
between states
A
and
B
.
In a transition
from
C
to
B
, an electron emits a photon of
wavelength 450 nm.
A
B
C

011
10.0 points
When a photon hits an electron and gives it
energy, what happens to the frequency of the
photon after bouncing from the electron?
013 (part 2 of 2) 10.0 points
What
is
the
emitted
wavelength
when
it
jumps from
C
to
A
?

1.
The frequency remains the same.
2.
It requires a case-by-case analysis.
3.
The frequency increases.
4.
The frequency decreases.
correct
Explanation:
Let :
E
CA
=
3
2
E
CB
.
λ
CA
λ
CB
=
E
CB
E
CA
=
2
3
λ
CA
=
2
3
λ
CB
=
2
3
(450 nm) =
300 nm
.

gilbert (amg3448) – HW13 – tsoi – (57210)
5
014 (part 1 of 2) 10.0 points
If, in
1
λ
=
R
y
1
1
n
2
2
,
you set
n
1
= 1 and take
n
2
greater than 1
,
you generate what is known as the
Lyman
series
.
Consider the next three members of this se-
ries. The wavelengths of successive members
of the Lyman series approach a common limit
as
n
2
→ ∞
.
What is this limit?

=
121
.
505 nm
.
015 (part 2 of 2) 10.0 points