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Kosmologi

Fysik

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Hvad er 1 lysår? Det er afstanden mellem jorden og solen. 1 lysår=9,4605*10^15 m = 63,240 AE
Hvad er AE? AE = Astronomisk enhed, som er en måle enhed indenfor universet.
Hvad er rødforskydning? Rødforskydning forklares ved at universet udvider sig.
Hvad er Hubbles lov? v=H_0*r
Hvilken teori tror vi på? Vi tror på BIG Bang.
Hvad er formlen for Hubbeltiden? T_0=r/v=1/H_0 = 13,7 milliarder år
Hvad gælder om det kosmologiske princip? Isotropt og homogent.
Hvad betyder det at universet er homogent? Densiteten er ens og de samme typer af objekter optræder overalt i universet. (dvs. ensartet)
Hvad betyder det at universet er isotropt? Dvs. at alle retninger i universet er lige værdige. Der er fx ikke noget centrum i universet.
Hvad forstås ved universets udvidelse? Rummet mellem galakserne bliver større.
Hvad er Big Bang teoriens tre søjler? Hubbles lovfor universets udvidelse. Baggrundsstråling. Heliumindholdeti universet.
Hvad er Hubbleskonstant? Den er i dag H_0=22(km/s)/Mly.
Hvad er komologisk baggrunstråling? Det er en efter glød fra universets dannelse.
Hvor gammel er eftergløden fra universets dannelse? ca. 300.000 år gammelt.
Created by: 1002247646538003
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