Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.9.2.3 · Astrophysics (A-level only) · Classification of stars (A-level only)
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3.9.2.3 Classification by temperature, black-body radiation (A-level only)
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Stefan’s law and Wien’s displacement law. General shape of black-body curves, use of Wien’s displacement law to estimate black-body temperature of sources. Experimental verification is not required. |
Assumption that a star is a black body.
Inverse square law, assumptions in its application.
Use of Stefan’s law to compare the power output, temperature and size of stars