Astronomy & space · University
Relative luminosity of a blackbody star · formula reference
Use the effective-temperature blackbody luminosity model and compare the same reference quantities.
Formula
Use the effective-temperature blackbody luminosity model and compare the same reference quantities.
L/Lref = (R/Rref)²(T/Tref)⁴
Worked example
In a blackbody model a star has radius 1.5 times a reference star and effective temperature 1 times the reference. Find L/Lref. Round the final result to 4 decimal places if needed.
Stefan–Boltzmann scaling gives (1.5)²(1)⁴.
2.25
Prerequisites and checking
Algebra and the topic definitions. Keep units and rounding consistent. State the model conditions before applying the formula.
Further reading and review references
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