Big Bang (cont.).notebook
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September 30, 2016
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Overall, the Universe is EXPANDING
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Cosmic Microwave Background Radiation Evidence of Big Bang
http://www.belllabs.com/project/feature/archives/cosmology/cosmicnoise.mp3
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Meanwhile, at Princeton University….Scientists derived a formula [λmax = (2.9 x 10‐3 m.K)/T] based on the hypothesis that the Universe was created as a hot big bang and slowly cooled as it expanded ….
If true, its current temperature would be 3 K (3 Kelvin)
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All objects emit electromagnetic radiation
The amount of radiation emitted at each wavelength indicates the temperature of the object
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average _________________ _______________
of the _____________________ in an object or a
system.
Temperature
kinetic energy
molecules
Big Bang (cont.).notebook
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September 30, 2016
Sep 137:56 AM
Temperature Warmer Temps = more ________________ _______________
(or) more ___________________ _________________
Cooler Temps = less ________________ _________________
(or) less ___________________ __________________
kinetic energy
kinetic energy
molecular movement
molecular movement
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Similar for wavelengths…..
Warmer Temps = ___________________ wavelengths (higher frequency)
Cooler Temps = ___________________ wavelengths (lower frequency)
shorter
longer
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Temperature of an object is related to the wavelength at which the object gives out the most energy….. this is known as its PEAK
The peak temp for microwave radiation is…..
Sep 137:56 AM
Sep 137:56 AM
Meanwhile, at Princeton University….
Scientists derived a formula [λmax = (2.9 x 10‐3 m.K)/T] based on the hypothesis that the Universe was created as a hot big bang and slowly cooled as it
expanded ….
If true, its current temperature would be 3 K (3 Kelvin)
Microwave radiation reaches its maximum energy at ‐270 oC
K = oC + 273 = 3 !