Physics A-Level
Logarithmic brightness ratio
What Logarithmic brightness ratio means in Physics A-Level, as defined for AQA.
Definition of Logarithmic brightness ratio
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Reference: AQA
A difference of 5 magnitudes corresponds to a brightness ratio of 100, so a magnitude 1 star is 100 times brighter than a magnitude 6 star.
Topics that use Logarithmic brightness ratio
- Classification by luminosity (A-level only) (AQA A-Level)
Related terms
- Apparent magnitude
- Apparent versus absolute magnitude
- Brightness
- Intensity of radiation received
- Irradiance
- Logarithmic brightness scale
- Logarithmic scale
- Luminosity
Using Logarithmic brightness ratio in the exam
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