Problem
Darkness
Other Names:
ShadowinessDimness
Gloominess
Nature:
Darkness, the direct opposite of lightness, is defined as a lack of illumination, an absence of visible light, or a surface that absorbs light, such as black.
Human vision is unable to distinguish colors in conditions of very low luminance because the hue sensitive photoreceptor cells on the retina are inactive when light levels are insufficient, in the range of visual perception referred to as scotopic vision.
The emotional response to darkness has generated metaphorical usages of the term in many cultures, often used to describe an unhappy or foreboding feeling.
Referring to a time of day, complete darkness occurs when the Sun is more than 18° below the horizon, without the effects of twilight on the night sky.
Broader Problems:
Absolute properties*complex Related Problems:
DeathIgnoranceBlindnessSolemnityStagnationInactivityInvisibilityInsensibilityUnintelligibility Reduced By:
Light pollutionRelated UN Sustainable Development Goals:
Problem Type:
A: Abstract Fundamental Problems Date of last update
04.10.2020 – 22:48 CEST