Prelim Physics Quick Revision
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4 Terms
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Why is the position of the line is different in each of the spectra?
Light is redshifted as it os the change of frequency of the light emitted by stars as observed from Earth, as the galaxies are moving away from the stars.
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Big Bang 3 Marker!
* Universe began with single burst of energy
* Early universe was small/very hot
* Universe expanded and cooled, the energy condesnsed into matter
* The matter created atoms and complex structures
* Quarks combine = protons and neutrons = nuclei ≠ interact photons
* Electrons stuck to nulei = atoms
* Photons then travel freely = cosmic microwave background radiation
* CMBR detected in 1965, has its own black body radiation, showing temp of universe - 2.7k
* Early universe was small/very hot
* Universe expanded and cooled, the energy condesnsed into matter
* The matter created atoms and complex structures
* Quarks combine = protons and neutrons = nuclei ≠ interact photons
* Electrons stuck to nulei = atoms
* Photons then travel freely = cosmic microwave background radiation
* CMBR detected in 1965, has its own black body radiation, showing temp of universe - 2.7k
3
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Things to remember about radiation vs wavelength
* The lower the peak wavelength the higher the temperature
* The lower the peak the higher the wavelength is
* The lower the peak the higher the wavelength is
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