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Originally shared by Dan PiponiBecause gravity is so weak, measuring the gravitational constant G is really hard. We know Planck's constant, say, to many more digits of accuracy. But worryingly, a new approach using atom interferometry gives a lower value for G than other methods.
http://www.nature.com/news/quantum-method-closes-in-on-gravitational-constant-1.15427
It would be really exciting if the lower result was a result of quantum mechanics being incompatible with classical gravity. But at the scale of this experiment these effects are probably not showing up.![Because gravity is so weak, measuring the gravitational constant G is really hard. We know Planck's constant, say, to many more digits of accuracy. But worryingly, a new approach using atom interferometry gives a lower value for G than other methods.
http://www.nature.com/news/quantum-method-closes-in-on-gravitational-constant-1.15427
It would be really exciting if the lower result was a result of quantum mechanics being incompatible with classical gravity. But at the scale of this experiment these effects are probably not showing up.](https://lh6.googleusercontent.com/-Sc3xZtp-vaw/U6McIsZ4xCI/AAAAAAAAIb0/Oxx1NtR9vr0/w900-h607/WEB_schlamminger.jpg)
http://www.nature.com/news/quantum-method-closes-in-on-gravitational-constant-1.15427
It would be really exciting if the lower result was a result of quantum mechanics being incompatible with classical gravity. But at the scale of this experiment these effects are probably not showing up.
![Because gravity is so weak, measuring the gravitational constant G is really hard. We know Planck's constant, say, to many more digits of accuracy. But worryingly, a new approach using atom interferometry gives a lower value for G than other methods.
http://www.nature.com/news/quantum-method-closes-in-on-gravitational-constant-1.15427
It would be really exciting if the lower result was a result of quantum mechanics being incompatible with classical gravity. But at the scale of this experiment these effects are probably not showing up.](https://lh6.googleusercontent.com/-Sc3xZtp-vaw/U6McIsZ4xCI/AAAAAAAAIb0/Oxx1NtR9vr0/w900-h607/WEB_schlamminger.jpg)
Because gravity is so weak, measuring the gravitational constant G is really hard. We know Planck's constant, say, to many more digits of accuracy. But worryingly, a new approach using atom interferometry gives a lower value for G than other methods. http://www.nature.com/news/quantum-method-closes-in-on-gravitational-constant-1.15427 It would be really exciting if the lower result was a result of quantum mechanics being incompatible with classical gravity. But at the scale of this experiment these effects are probably not showing up.
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