Can a black hole actually have a color?
We define black holes by the absence of light, yet physics suggests a different possibility. This video explores how the concept of 'black' changes when we look beyond visible light to the realm of quantum chromodynamic charge.
While the defining characteristic of a black hole is its gravitational pull—so intense that even light cannot escape the event horizon—the term 'black' is traditionally used to denote an absence of light and color (S1:p1, S2:p1). However, the video explores how a black hole could be considered 'colored' if we define color through quantum chromodynamic charge (S1:p1).
The physics of these objects is driven by extreme density. A black hole forms when a massive star's core collapses into a singularity of infinite density and zero volume (S2:p1). While they are effectively invisible because they emit no light, astronomers detect them by observing their effects on nearby matter, such as the intense X-ray radiation emitted by gas heating up in a binary system (S2:p6, S4:p3).
Source: Do Black Holes Have to Be Black?
