EM
Visible
light
Doppler
Waves
Terms
math
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Radio waves
The lowest frequency of
electromagnetic radiation is
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It is both
Is electromagnetic radiation a
wave or a particle?
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Visible and radio
Two forms of
electromagnetic radiation that
penetrate the atmosphere best
are:
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gamma
The radiation with the shortest
wavelength is
$1000
X-rays don’t penetrate the Earth’s
atmosphere
There are no X-ray telescopes on
Earth because
$200
red
Which color of visible light
radiation has the longest
wavelength?
$400
violet
The visible light with the
shortest wavelength is
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visible
What type of radiation can be
observed well from Earth’s
surface?
$800
A rainbow, which acts as a prism bending
light at different angles depending on the
wavelength of the color
As white light passes through a
raindrop what can occur
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We don’t for sure. Since lightmust travel
millions of light years, the light we see is
millions of years old.
How do we know that a star
in a distant galaxy is still
there?
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red
Objects we are moving away
from appear
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Doppler effect
When you hear a siren change
pitch as it approaches you
this is an example of
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No shift at all (not blue or red) so it will
appear yellow
The light from an object
moving from right to left will
exhibit
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blue
An object moving towards us
would appear
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You can give its radial velocity, either towards
or away from us.
What information can be
inferred about a star from its
Doppler shift?
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Wavelength
The distance between two
peaks in a wave is the
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Velocity or speed
Frequency x Wavelength
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No, EM does not need a medium
Is it true that all waves must
travel through a medium?
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Frequency measured in Hz
Number of waves passing an observer in a second is
called the ________________________ and is
measured in ________________________
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Sound travels through a material medium,
and can not travel through a vacuum
Why can you hear a tree fall
in the forest but you can’t
hear me slam the space
capsule door in space?
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Wave
Does diffraction demonstrate
the wave nature of light or the
particle nature?
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amplitude
The distance between the top
of the crest and the middle of
the wave is?
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Kelvin
Temperature scale that places
zero at the point where all
atomic motion ceases.
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perpendicular
Electrical and magnetic fields
of light are
__________________ to
each other (perpendicular or
parallel?)
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Doppler effect
Motion induced change in
observed frequency of a wave
is called
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6
The distance between two crest
is 6 cm and the distance from
the median to the top of the
crest is 4 cm. what is the
wavelength?
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¼ or .25 Hz
A wave has a period of 4 seconds, what is it’s
frequency
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It’s temperature
What determines a
blackbodies energy peak?
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The fourth power of its temperature or
Temperature 4 (x a constant)
The total energy radiated by a
blackbody is dependent on (what is
the equation)
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Star B must be larger.
Star A and Star B are the same
temperature, but star B is more
luminous. What can you tell
about these stars?