Quarks to Cosmos Lecture Sheet 16
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Cosmology & Expansion
Last updated 8:52 PM on 11/18/25
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8 Terms
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What is Hubble’s Law?
v = H₀ d.
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What determines expansion rate?
Energy density (matter, radiation, dark energy).
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Does H₀ change?
Yes over cosmic time.
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Can expansion exceed c?
Yes; space expands.
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What does z > 1 indicate?
Large redshift; very distant.
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Most distant standard candles?
Type Ia supernovae.
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Einstein’s “biggest mistake”?
Cosmological constant for static universe.
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Consequence of expansion?
Universe is dynamic, not static.
Note 
Flashcards (36)