Name: How Many Digits of Pi Do We Really Need? by SciFri
Duration: 2 min 20 s
Description: Mathematician James Grime of the YouTube channel Numberphile has determined that 39 digits of pi should suffice.

I was reciting Pi as he said it to make sure he was right and also for fun!

He got it wrong! He didn't say the 4 that comes after 27950288. The 4 should come after that last 8. But after that, he was fine!

Ryan Rykaczewski describes one of the most massive migrations on the planet, driven by the sun. Image by Tintinnidguy (Own work) [CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons 

#ExplainTheSun  - The Largest Migration on The Planet

Once, there was the ordinary incandescent light bulb. It shone brightly, but wasted much of the energy put into it as heat. Then came the compact fluorescent. And as costs have dropped, consumers have increasingly been switching to light-emitting diode (LED) technology for many lighting applications, in an ongoing search for a more efficient bulb. Now, in work published in the journal Nature Nanotechnology, researchers report that nanophotonic devices may be able to breathe new life into old incandescent technology. Marin Soljačić and Ognjen Ilic, two authors of the study, explain how they’ve been able to “recycle” some of the incandescent bulb’s wasted heat and re-emit it as visible light, boosting efficiency.

For the Lowly Incandescent Bulb, a Ray of Hope

Mathematician James Grime of the YouTube channel Numberphile has determined that 39 digits of pi should suffice.

How Many Digits of Pi Do We Really Need?

Science, technology, and other cool stuff from public radio's Science Friday. It's brain fun, for curious people. From WNYC Studios.

How Many Digits of Pi Do We Really Need?

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