Red-shift (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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Red shift
Red shift
Light from galaxies stretched towards red end of spectrum
When red shift occurs
When red shift occurs
When galaxies are moving away from Earth
Redshift & distance relationship
Redshift & distance relationship
Amount of redshift increases with distance of galaxy
What redshift provides evidence for
What redshift provides evidence for
Universe is expanding
Balloon analogy: uninflated balloon represents
Balloon analogy: uninflated balloon represents
Start of Big Bang
Balloon analogy: galaxies represented by
Balloon analogy: galaxies represented by
Dots on balloon surface
Effect of universe expansion on galaxies
Effect of universe expansion on galaxies
Distance between galaxies increases
Light in expanding space
Light in expanding space
Gets stretched
Wavelength change in red shift
Wavelength change in red shift
Wavelengths appear longer, shift towards red end
Frequency change in red shift
Frequency change in red shift
Frequency of light appears to decrease
Why frequency decreases in red shift
Why frequency decreases in red shift
Each wave emitted from position further from observer
What red shift observation supports
What red shift observation supports
Universe has been expanding since the Big Bang