Darkness is the absence or partial absence of light, and it can be characterized by several features or qualities. Here are three features of darkness:

1. Low or Absent Illumination: Darkness is primarily defined by the absence or extremely low levels of illumination. In areas of darkness, there is insufficient light for the human eye to perceive objects clearly. The level of darkness can vary, ranging from a dimly lit room to complete darkness in the absence of any light source.
2. Subjective Experience: Darkness is not only a physical absence of light but also a subjective experience. It can evoke various emotional and psychological responses in individuals. For some, darkness may create feelings of fear, uncertainty, or isolation, while others may find it calming or peaceful. This subjective aspect of darkness can influence how people perceive and react to low-light conditions.
3. Natural and Artificial Sources: Darkness can occur naturally during nighttime when the sun is below the horizon, resulting in a lack of natural sunlight. However, darkness can also be artificially created or intensified through the absence of artificial lighting or the obstruction of natural light sources. For example, turning off the lights in a room creates artificial darkness, while entering a cave or an enclosed space with no natural light source can result in complete darkness.

Darkness is a complex and multifaceted phenomenon, and its perception and significance can vary across cultures and individuals. It plays a fundamental role in the daily rhythms of life, affecting sleep patterns, safety, and human behavior. Additionally, darkness has cultural, symbolic, and artistic significance, often representing themes such as mystery, the unknown, and the passage of time in literature, art, and folklore.