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Re: [Phys-L] the new SI -- ampere, kilogram, kelvin, and mole

From: John Denker <jsd@av8n.com>
Date: Sun, 28 Aug 2016 15:26:46 -0700

On 08/28/2016 03:17 PM, Chuck Britton wrote:

This implies that the coulomb will be defined with more precision
than is currently possible in measuring the electronic charge -
right?

Infinitely more.

When it's defined, it's defined exactly.
No error bars.
No uncertainty.
No notion of «significant digits» or anything like that.

By way of analogy, the inch is 2.54 cm exactly, by definition.
The speed of light is 299792458 m/s exactly, by definition.

References:
- [Phys-L] There's a new AMPERE coming.;
  - From: "Bob Sciamanda" <treborsci@verizon.net>
- Re: [Phys-L] There's a new AMPERE coming.;
  - From: Chuck Britton <britton@ncssm.edu>
- Re: [Phys-L] the new SI -- ampere, kilogram, kelvin, and mole
  - From: John Denker <jsd@av8n.com>
- Re: [Phys-L] the new SI -- ampere, kilogram, kelvin, and mole
  - From: Chuck Britton <britton@ncssm.edu>

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