The parentheses in the last 2-digits denote that we’re not totally sure those last two numbers are a one and a five due to experimental error.
No, they are the standard deviation on the previous digits, i.e. we’re 68% sure that the g-factor is between 2.0023193043607 and 2.0023193043637.
No, they are the standard deviation on the previous digits, i.e. we’re 68% sure that the g-factor is between 2.0023193043607 and 2.0023193043637.