What types of material absorbs all of the light that strikes it?

Materials that absorb all of the light that strikes them are known as "black" materials. The most notable example is a perfect black body, which theoretically absorbs all wavelengths of electromagnetic radiation without reflecting any light. In practical applications, substances like Vantablack, made of vertically aligned carbon nanotubes, and black paints with high absorbance are designed to minimize reflection and absorb nearly all light. These materials are often used in scientific instruments and artistic applications for their unique light-absorbing properties.