Luminosity Law
In 1922, Hubble published the result of his investigations on bright nebulae. One part of this work is the Hubble luminosity law for reflection nebulae which make a relationship between the angular size (R) of the nebula and the apparent magnitude (m) of the associated star:
- 5 log(R) = -m + k
where k is a constant that depends on the sensitivity of the measurement.
Read more about this topic: Reflection Nebula
Famous quotes containing the word law:
“Well, I always say the law was meant to be interpreted in a lenient manner. And that’s what I try to do, is sometimes I lean to one side of it, sometimes I lean to the other.”
—Irving Ravetch (b. 1920)