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Samenvatting Samenvating natuurkunde - astrofysica - vwo 5 $5.92   Add to cart

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Samenvatting Samenvating natuurkunde - astrofysica - vwo 5

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In deze samenvatting vind je hoofdstuk 11 astrofysica.

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  • October 6, 2023
  • 2
  • 2022/2023
  • Summary
  • Secondary school
  • 5
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NATUURKUNDE H11
Absorbtie/ emissie -> Ef = Em - En , met m > n
§1 STERREN WAARNEMEN
Etot = En + Ef
Astrologie -> het lot en aanleg van mensen Als Etot > of = 0 atoom kan ioniseren
herkennen aan de stand van sterren. De energie van het atoom in de stationaire
Astronomie -> het systematisch in kaart brengen toestand -> En = -13,6 eV : n2
van waarnemingen van het heelal.
Astrofysica -> het vinden van natuurkundige
verklaringen, eigenschappen van sterren afleiden.
§3 SNELHEID VAN STERREN
Telescopen: Tangentiele snelheid -> loodrecht op de
1. Optische telescoop verbindingslijn.
o Grotere lichtopbrengst Radiale snelheid -> in de richting van de
o Groter scheidend vermogen dan oog verbindingslijn.
o Lens
o Spiegel Dopplereffect - > vrad = (Δλ / λ) ∙ c
2. Radiotelescoop • Bij roodverschuiving is Δλ > 0 en is de
o Andere straling dan waar het oog snelheid van je af
gevoelig voor is • Bij blauwverschuiving is Δλ < 0 en is de
3. Ruimtetelescoop snelheid naar je toe
o Geen hinder van atmosfeer


§2 STERRENSPECTRA
Continue spectra -> alle golflengtes
Discrete spectra -> beperkt aantal golflengtes

Emissiespectrum -> terug weerkaatst
Absorptiespectrum -> absorbeert

Atoommodellen: Uitdijding heelal:
krentenbolmodel -> Thomson = vrijwel alle sterren bewegen zich van ons af.
Planetenmodel -> Rutherford  Het universum wordt groter, waarschijnlijk
Schillenmodel -> Bohr uit de oerknal ontstaan.

Wet van Hubble:
Vrad = H0 x r

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