Big Bang (cont.).notebook - Unatego Bang Part II (2015)2.pdf that the Universe was created as a hot

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Transcript of Big Bang (cont.).notebook - Unatego Bang Part II (2015)2.pdf that the Universe was created as a hot

  • Big Bang (cont.).notebook

    1

    September 30, 2016

    Sep 13­7:56 AM Sep 13­7:56 AM

    Overall, the Universe is EXPANDING

    Sep 13­7:56 AM

    Cosmic Microwave Background Radiation Evidence  of Big Bang 

    http://www.bell­labs.com/project/feature/archives/cosmology/cosmicnoise.mp3

    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)

    Sep 13­7:56 AM

    All objects emit electromagnetic radiation

    The amount of radiation emitted at each  wavelength indicates the temperature of the object

    Sep 13­7:56 AM

    average  _________________ _______________ 

    of the _____________________ in an object or a

    system.

    Temperature 

    kinetic energy

    molecules

    http://www.bell-labs.com/project/feature/archives/cosmology/cosmicnoise.mp3

  • Big Bang (cont.).notebook

    2

    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

    Sep 13­7:56 AM

    Similar for wavelengths…..

    Warmer Temps = ___________________ wavelengths                                (higher frequency)

    Cooler Temps = ___________________ wavelengths                                (lower frequency)

    shorter

    longer

    Sep 13­7:56 AM

    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 !

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