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Fold paper into 3 sections
Electromagnetic Radiation
Definition:
Formulas to remember
Other relevant Info.
Electromagnetic wave relationship
White light can be
separated into ________
____________________
____________________
c=λv
Characteristics of Waves
Using Planck’s constant
Equantum = hv
Wavelength (λ):
The color with the
highest frequency
Photoelectric Effect
is_______/ with the
Ephoton = hv
lowest frequency is
What do the variables stand _________
for?
Equantum (J)= ______________ List the different forms of
Ephoton (J) = _______________ electromagnetic radiation
λ (m, cm, nm) = _____________ in order of least to
greatest frequency:____
h (J∙s) = __________________
v ( Hz, s-1)= ________________ ____________________
c (m/s)= ___________________ ____________________
____________________
As photon energy
h = 6.626 x 10-34 J∙s
J is
increases, what happens
joules and is the unit for energy
to wavelength and
frequency?___________
c = 3.00 x 108 m/s
____________________
Frequency (v):
Amplitude:
Draw and Label the parts of
a wave:
Practice Problems
Name:__________
Date: _________
Period:_______
What is the wavelength
of a microwave with a
frequency of 5.22 x 108
Hz?
Calculate the frequency
of photon that has an
energy of 5.313 x 10-16 J
Formula:
Work:
Ans with correct units and
proper sig figs.
Formula:
Work:
Ans with correct units and
proper sig figs.
What is the energy of a
quantum with a frequency
of 1.05 x 1016 s-1
Formula:
Work:
Ans with correct units and
proper sig figs.
Chapter 5 in your text
pp. 117-141
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In the early 1900’s scientist discovered that
certain elements gave off visible light when
heated in a flame. Analysis of this light
revealed that an element’s chemical behavior
is related to the arrangement of electrons.
Because of this, it became important to
understand nature of light

Electromagnetic radiation: a form of energy
that exhibits wavelike behavior as it travels
through space.
Examples
Visible light from the sun, microwaves,
x-rays, radio waves, etc
Wavelength: λ
 shortest distance between equivalent points on a continuous
wave; measured from crest to crest or trough to trough
 expressed in meters, centimeters, or nanometers
Frequency: v
 The number of waves that pass a given point per second
 Expressed in hertz (Hz or s-1)
Amplitude
 Wave’s height from the origin to a crest or origin to a trough
crest
origin
amplitude
c=λv
where c is the speed of light, λ is wavelength, and v
is frequency
Example:
What is the wavelength of a microwave with a
frequency of 3.44 x 109 Hz?
λ = c/v
λ = 3.00 x 108 m/s = 8.72 x 10-2 m
3.44 x 10 s-1
Although the speed of
Electromagnetic waves is
the same, wavelengths and
frequencies can be
different
(ex: higher frequency =
shorter wavelength)
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White light, such as
sunlight, can be separated
into a continuous spectrum
of colors if passed through
a prism. These are the
colors of the rainbow (roy g
biv – red, orange, yellow,
green, blue, indigo, violet)

Electromagnetic spectrum (EM spectrum) is all forms of
electromagnetic radiation where the only difference in
the types of radiation is their wavelengths and
frequencies
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The wave model couldn’t explain the
emission of the different wavelengths. In
1900, Max Planck studied the light given off
by heated objects. His studies led him to the
conclusion that matter can gain or lose
energy in small amounts called “quanta.”
A Quantum is the minimum amount of energy
that can be gained/lost by an atom
Equantum = hv
Equantum is energy, h is Planck’s constant, and v is
frequency
The value for Planck’s constant is 6.626 x 10-34 J∙s
J is joules and is the unit for energy
Example: What is the energy of a photon from the violet
portion of the Sun’s light if it has a frequency of
7.230 x 1014 s-1 ?
Ephoton = (6.626 x 10-34 J∙s) (7.230 x 1014 s-1 )
= 4.791 x 10-18 J
Photoelectrons are given off a metal’s surface
when light of a certain frequency shines on
the surface
 Einstein proposed light has a dual nature- A
beam of light has wavelike and particlelike
properties. A beam of bundles of energy
were called photons (massless particle that
carries a quantum of energy.
 Ephoton = hv
As the energy of a photon increases, the
frequency increases. What can you conclude
about the wavelength.
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