⏰ when
When was gravitational time dilation first experimentally confirmed?
Quick Answer
It was confirmed in 1959 by the Pound-Rebka experiment.
The Full Story
Gravitational time dilation was experimentally confirmed in 1959 by Robert Pound and Glen Rebka at Harvard University. They used gamma rays in a tower to test how gravity affects the frequency of light. Their result supported Einstein's general relativity, showing that time runs differently in stronger gravitational fields. It was one of the first direct tests of a key prediction of relativity.
Key Facts
1.Confirmed in 1959
2.Used the Pound-Rebka experiment
3.Supported general relativity
YouTube Angle
Suggested video title for this topic:
"The experiment that proved gravity changes time."
Was this answer helpful?
Tap a reaction — it helps us pick what to cover next.