Redshift (Edexcel GCSE Physics): Flashcards
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12 cards from this deck
What is red shift?
What is red shift?
Light from galaxies stretched toward red end of spectrum
When does red shift occur?
When does red shift occur?
When galaxies move away from Earth
Redshift amount vs. galaxy distance
Redshift amount vs. galaxy distance
Redshift increases with distance
What evidence does redshift provide?
What evidence does redshift provide?
Universe is expanding
Effect of universe expansion on galaxies
Effect of universe expansion on galaxies
Distance between galaxies increases
Effect of universe expansion on light wavelength
Effect of universe expansion on light wavelength
Wavelength increases
Effect of universe expansion on light frequency
Effect of universe expansion on light frequency
Frequency decreases
What does redshift support?
What does redshift support?
Universe expanding since Big Bang
What do different elements absorb?
What do different elements absorb?
Different frequencies/wavelengths of light
Pattern each element produces
Pattern each element produces
Specific pattern of dark lines at absorbed frequencies
What do redshift measurements suggest?
What do redshift measurements suggest?
All galaxies moving away quickly in every direction
Galaxy distance vs. speed relationship
Galaxy distance vs. speed relationship
Further away = faster moving away