Galactic Red-shift (AQA GCSE Physics): Flashcards
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Practise the cards
12 cards from this deck
What is red shift?
What is red shift?
Light from distant galaxies stretched towards red end of spectrum
Condition for red shift
Condition for red shift
Galaxies moving away from Earth
Redshift amount vs galaxy distance
Redshift amount vs galaxy distance
Redshift increases with distance
Evidence from red shift
Evidence from red shift
Universe is expanding
Big Bang balloon analogy shows what?
Big Bang balloon analogy shows what?
How universe expands and galaxies move apart
What do dots on balloon represent?
What do dots on balloon represent?
Galaxies
What happens as universe expands?
What happens as universe expands?
Distance between galaxies increases
What happens to light in expanding space?
What happens to light in expanding space?
Gets stretched, causing red shift
Effect of red shift on wavelength
Effect of red shift on wavelength
Wavelengths appear longer
Direction of wavelength shift
Direction of wavelength shift
Towards red end of spectrum
Frequency change with wavelength increase
Frequency change with wavelength increase
Frequency decreases
Theory supported by red shift
Theory supported by red shift
Universe expanding since Big Bang