Apparent brightness — Science definition
Energy received per unit area per time at an observer.
Where it is taught
- Star Properties & H–R Diagrams — Stars & the Universe, Earth & Space Science, Grade 9
In use
Apparent brightness is the energy reaching an observer per area and depends on distance as well as luminosity.
Star Properties & H–R Diagrams
Questions using apparent brightness
Problem 1
Why can apparent brightness not determine luminosity by itself?
Answer and explanation
Distance and intervening material affect the observed brightness.