👤 whose
Whose work established that the speed of light is the same for all observers in vacuum?
PhysicsRelativity
Quick Answer
Albert Einstein’s special relativity. In 1905, he made the constancy of the speed of light a central postulate.
The Full Story
Einstein’s special relativity transformed physics by showing that measurements of time and space depend on motion, while the speed of light in vacuum remains constant for all inertial observers. This idea led to time dilation, length contraction, and the famous relation between mass and energy. It overturned the Newtonian picture of absolute time and space. Special relativity is one of the pillars of modern physics and underlies technologies such as GPS corrections.
Key Facts
1.Published in 1905
2.Light speed in vacuum is about 299,792,458 m/s
3.Led to time dilation and length contraction
YouTube Angle
Suggested video title for this topic:
"Why Einstein said the same light beam can’t be seen differently by different observers."