A material that reflects or absorbs all of the light that strikes it is called a blackbody.

Here's why:

* Reflection: A blackbody reflects no light, meaning it doesn't scatter any light back to the viewer.

* Absorption: A blackbody absorbs all light that hits it, converting the light energy into other forms like heat.

While a perfectly black object might not exist in reality, the concept of a blackbody is very important in physics and astronomy. It serves as a theoretical model to understand the behavior of light and heat radiation.