Physics A-Level
Brightness
What Brightness means in Physics A-Level, as defined for AQA.
Definition of Brightness
Check what you remember
Read the wording for your board, then hide it and explain Brightness in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A subjective scale of measurement that depends on the observer, viewing conditions and the eye's response, so it is not a reliable scientific quantity.
Topics that use Brightness
- Classification by luminosity (A-level only) (AQA A-Level)
Related terms
- Apparent magnitude
- Apparent versus absolute magnitude
- Intensity of radiation received
- Irradiance
- Logarithmic brightness ratio
- Logarithmic brightness scale
- Logarithmic scale
- Luminosity
Using Brightness in the exam
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