Edexcel A-Level Physics Age and Fate of the Universe

Review the age and fate of the universe in Edexcel A-Level Physics through Hubble constant estimates, critical density and dark-matter evidence.

Exam points

estimate universe age using t ≈ 1/H0 and convert between seconds and years
explain how revised galaxy distances change H0 and the inferred age of the universe
link critical density or dark matter evidence to open, closed or uncertain universe models

[Maximum number: 1]

The ultimate fate of the universe is uncertain.
Which of the following would result in an open universe?

The average density of the universe is equal to the critical density of the universe.

The average density of the universe is less than the critical density of the universe.

The mass of the universe is equal to the critical mass of the universe.

The mass of the universe is greater than the critical mass of the universe.

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