Evaluate Wave and Particle Models
Physics · Flashcards · Application
PHYSICS · FLASHCARDS
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QUESTION
Find photon energy for
f
=
5.0
×
10
14
Hz
f=5.0\times10^{14}\,\text{Hz}
f
=
5.0
×
1
0
14
Hz
using
h
=
6.63
×
10
−
34
J⋅s
h=6.63\times10^{-34}\,\text{J·s}
h
=
6.63
×
1
0
−
34
J⋅s
.
QUESTION
Identify the correct model: Light transfers energy in discrete packets and ejects electrons instantly above
f
0
f_0
f
0
.
QUESTION
Find
K
max
K_{\max}
K
m
a
x
if
h
f
=
4.0
eV
hf=4.0\,\text{eV}
h
f
=
4.0
eV
and
ϕ
=
2.5
eV
\phi=2.5\,\text{eV}
ϕ
=
2.5
eV
in the photoelectric effect.
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ANSWER
K
max
=
1.5
eV
K_{\max}=1.5\,\text{eV}
K
m
a
x
=
1.5
eV
. Subtracts work function from photon energy:
4.0
−
2.5
=
1.5
4.0-2.5=1.5
4.0
−
2.5
=
1.5
eV.
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