Question

In optics an object is anything that gives out light (either it's own light or reflected by it). Let's consider a 3D material which is totally black.
But black colour absorbs all d light incident on it, hence it doesn't emit or refect light.

so can we consider that black material as an object????

Answer 1

The more light the object absorbs, the more heat absorbed since light is energy. If you consider it a color, black absorbs the most heat. A black object absorbs all wavelengths of light and reflects none. Objects that are white, on the other hand, reflect all wavelengths of lightand therefore absorb the least heat.
Black objects do not absorb more light or energy necessarily. Rather, objects that absorb more light/energy appear to be black, due to the absorption of said light. Thus it is the elemental material make-up which determines color based on what wavelengths of energy it absorbs or reflects

IF IT IS WRONG I AM SORRY

Answer 2

Answer:

Shadows are formed when light hits an opaque object (see picture). ... Darker objects absorb light more than pale ones do. When an object absorbs light, it warms up. This is because light energy changes into heat energy.