When a material reflects all wavelengths of visible light an object appears?

When a material reflects all wavelengths of visible light, the object appears white. This is because white light is composed of all the colors of the visible spectrum, and when an object reflects all these wavelengths without absorbing any, it creates the perception of whiteness. Conversely, if a material absorbs most wavelengths and reflects only a few, it will appear colored based on the wavelengths it reflects.