Escuridão

Escuridão refers to the absence of visible light. It is a fundamental aspect of human perception and experience, often contrasted with light, which allows us to see and interact with our surroundings. The perception of darkness is subjective and depends on the sensitivity of the observer's eyes and the amount of ambient light present. In complete darkness, vision is impossible.

The concept of darkness holds significant symbolic meaning across cultures and throughout history. It is frequently associated with mystery, the unknown, fear, and the subconscious. Conversely, darkness can also represent peace, rest, and introspection, offering a respite from the constant stimulation of light. In scientific terms, darkness is not a substance but rather a state where photons are not being emitted or reflected in sufficient quantities to stimulate the photoreceptor cells in the eye. The study of how organisms perceive and respond to light and darkness is a significant area within biology and neuroscience. The ability to navigate and function in low-light conditions varies greatly among species, with many animals having adaptations for nocturnal activity.