5 Questions
What is the speed of light in vacuum, denoted as c, in meters per second?
299,792,458
According to the special theory of relativity, what is the upper limit for the speed at which conventional matter or energy can travel through space?
The speed of light
What did Ole Rømer first demonstrate in 1676 related to the speed of light?
Light does not travel instantaneously
For many practical purposes, what effect does the finite speed of light have on the propagation of electromagnetic waves?
It will have noticeable effects over long distances
What did viewing starlight from Earth allow humans to study?
The history of the universe
Study Notes
Speed of Light
- The speed of light in vacuum, denoted as c, is approximately 299,792,458 meters per second.
- According to the special theory of relativity, the speed of light (c) is the upper limit for the speed at which conventional matter or energy can travel through space.
Historical Discovery
- In 1676, Ole Rømer first demonstrated the finite speed of light.
Practical Effects
- The finite speed of light has a significant effect on the propagation of electromagnetic waves, making it a crucial factor in many practical applications.
Astronomical Significance
- Viewing starlight from Earth allows humans to study the past, as the light has traveled from the star over a significant period of time, providing a glimpse into the star's history.
Test your knowledge about the speed of light, a universal physical constant that plays a crucial role in the special theory of relativity and sets the upper limit for the speed of conventional matter or energy.
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