David Wallace
speaker
1,940 appearances
2 recordings
1 series
first heard May 2025
last heard 20 Jul
David Wallace’s voice in public audio — every appearance, attributed to the second.
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Appearances
Um
How do you test that theory?
Well, you you know, you get a big stock of neutrons, um, you measure them, and you
uh see how many have decayed in a certain length of time and you say, okay, that's a half-life.
And if that number matches your theory, you say, Hooray, my theory is confirmed.
Nobel Prize please.
And if it doesn't match, you say, damn, you throw the theory out.
Mm-hmm.
But of course, there's a bit of risk going on there because each of those radioactive decays is probabilistic.
If I say the half-life of the neutron is it, 800 seconds?
I can't remember.
It doesn't matter.
If I say the half-life of the neutron is 800 seconds, um, I don't actually mean that if I take a sample of neutrons, exactly half of them have decayed in 800 seconds.
I mean that each individual neutron.
has a.5 probability.
of decaying in eight hundred seconds.
If I've got a thousand neutrons, there's a one in two to the thousand chance that none of them will be decayed.
after eight hundred seconds.
Um one in two to the thousand is not a large number, but it's not zero.
So anytime you're confirming or falsifying
Showing 921–940 of 1,940 · page 47 of 97
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