Stefan constant
What Stefan constant means in Physics A-Level, as defined for AQA, OCR.
Definitions of Stefan constant
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Reference: AQA
The constant σ in Stefan's law, which cancels along with 4π when a ratio is formed for two stars.
A universal constant, approximately 5.67 × 10⁻⁸ W m⁻² K⁻⁴, represented by σ in Stefan's law.
Topics that use Stefan constant
- Classification by temperature, black-body radiation (A-level only) (AQA A-Level)
- Electromagnetic radiation from stars (OCR A-Level)
Related terms
- Peak wavelength
- Stefan's law
- Wien's displacement law
- Black body
- Black-body modelling of stars
- Continuous spectrum
- Discrete energy levels
- Emission line spectrum
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