Cosmic Microwave Background

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Cosmic Microwave Background
Presentation by Katria Kangas, Amber Marion
Grant Gabler
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The Cosmic Microwave
Background Radiation
1965- Arno Penzias Robert Wilson discover/prove
CMB existence.
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Everyday CMB affects...
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Basic Concepts
CMB Cosmic Microwave Background
Cosmic is the word used based upon the knowledge
that radiation earliest source is the universe.
It has been concluded that CMB is the cooled
remnant of the hot Big Bang itself!
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Microwave is the term used because light travels
in a range of wavelengths. It is the travelling
of light through the concentrations of
oscillating electric and magnetic field called
Electromagnetic radiation- the same concepts of a
microwave. Microwave is the name assigned to
radiation between the infa-red and radio region.
Faint signals are given out through the
microwaves. With a detector one can detect them.
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Background is used because it is all around us.
The noise clearly doesnt come from any object
nearby (stars or clouds in our Galaxy).
One analogy is perceiving the universe as being
filled with this background microwave photons.
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Connecting
CMB to The Big Bang
Three cornerstones to the Big Bang are 1.) the
blackbody nature of the CMB spectrum 2.)
redshifting of distant galaxies 3.) the observed
abundances of light elements indicating they were
cooked at earlier times
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COBE satellite
Cosmic Background Explorer
1990 COBE confirmed microwave background,
supporting Big Bang theory.
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COBE 4 year data
Shows polarization photos of Earth.
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Polarization
A Close-Up!!
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Cosmic Anisotropy Telescope
First published results came in 1996.
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MAP
Microwave Anisotropy Probe
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PLANCK
Max Planck Surveyor (formerly known as
COBRAS/SAMBA)
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Blackbody Radiation
A black body is a theoretical object that absorbs
100 of the radiation that hits it. Therefore it
reflects no radiation and appears perfectly
black.
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Question Time
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Thank you very much! THE END