Hubble Constant (H₀)

Key term for OCR GCSE Physics B, used in The Big Bang.

Definition

The constant of proportionality representing the rate at which the universe is currently expanding, found by calculating the gradient of a velocity-distance graph.

Exam Context

Hubble Constant (H₀) appears in OCR GCSE Physics B revision content for Matter – models and explanations, especially The Big Bang and The Big Bang.

Matter – models and explanations The Big Bang The Big Bang

Found in Revision Notes

Matter – models and explanations

Red-shift and Evidence for the Big Bang

The Big Bang • The Big Bang

Revise note

Related Key Terms

Absorption spectrum Big Bang model CMBR Cosmological red-shift Doppler effect Hubble's Law Receding galaxy Recession velocity

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