Physics A-Level
Intensity ratio
What Intensity ratio means in Physics A-Level, as defined for AQA.
Definition of Intensity ratio
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Reference: AQA
The ratio of received intensities of two stars, related to their magnitude difference by m₂ − m₁ = 2.5 log₁₀(I₁/I₂).
Topics that use Intensity 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 ratio
- Logarithmic brightness scale
- Logarithmic scale
Using Intensity ratio in the exam
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