Bodies in motion Quote by Albert Einstein
“Each ray of light moves in the coordinate system 'at rest' with the definite, constant velocity V independent of whether this ray of light is emitted by a body at rest or a body in motion.”
About This Quote
Source Speech: 1905 paper on Special Relativity, 1905
Light travels at a constant speed regardless of the motion of its source, showing the universality of the speed of light.
In simple terms: Light speed is always the same.
Recognize that some laws are invariant.
Themes
Mood
Type
When to use this quote
- laboratory experiments
- astronomical observations
- GPS technology
Key Concepts
Questions to Reflect On
- How does this constancy affect our perception of time?
- What technologies rely on this principle?
Assumes idealized inertial frames; real-world media can affect speed.