Candle Quote by Paul W. Brand
““Under optimum conditions the human eye can detect a candle at a distance of fifteen miles.””
About This Quote
Source Book: Scientific American, 1965, article on human vision
The eye can perceive a small light source from very far away under ideal conditions.
In simple terms: Eyes can see a candle fifteen miles away.
Key Takeaway
Recognize human sensory limits.
Themes
perception
human biology
limits
Mood
informative
curious
Type
scientific
educational
When to use this quote
- night navigation
- astronomy
- safety signaling
Key Concepts
Vision
sensitivity
Questions to Reflect On
- How does this fact affect design of visual alerts?
- What limits affect everyday sight?
A Different Perspective
Real world conditions rarely match optimal lab settings.
