Question Number 27609 by neilpalmer last updated on 10/Jan/18
$$\Delta=\sqrt{{m}×\phi} \\ $$$$\Delta={mass}\:{gap} \\ $$$${m}={mass} \\ $$$$\phi={phi} \\ $$$${calculate}\:{phi}\:{to}\:{the}\:{same}\:{number}\:{of}\: \\ $$$${decimal}\:{places}\:{as}\:{the}\:{mass}. \\ $$$${use}\:{the}\:{mass}\:{of}\:{an}\:{electron} \\ $$