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Who decides how long a second is? - John Kitching

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Rating: 4; Vote: 2

Discover how scientists developed atomic clocks, which use the vibrations of atoms to measure and maintain a globally consistent time. In 1967, researchers gathered to answer a long-running scientific question: just how long is a second? It might seem obvious at first. A second is the tick of a clock, the swing of a pendulum, the time it takes to count to one. But how precise are those measurements? And what is that length based on? John Kitching digs into how we scientifically define this fundamental unit of time. Skeletal: I don t agree when this guy said that small units of time weren t needed because day s and hours were sufficient for most tasks at the time. Like there are so many situations where the second is useful it just seems like a ridiculous proposition
Date: 2021-01-19

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Comments and reviews: 5

Social
What I always wondered is why do leap year? Why not just change the definition of a second and distribute those 1, 440 extra seconds in 4 years?
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SHIRLEY
Thank you Ted-Ed for teaching me so much. You've really made my 2020 knowledgeable. I look forward to watching all of your future videos.
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Sun
Does anyone knows who is this voice of this Ted Ed?
I'm very curious.
We already know who is the voice of the 73 Question with Vogue
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Eduardo
0: 50 The british empire didn't adopt the gregorian calendar until the 1700, it expanded with the spanish, dutch and french
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Gouri
Time is what we want most but what we use worst
-William Penn
Just use time wisely
Time won't stop for anyone.
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