I appreciate you doing this even if, in the end, I can't follow the maths.
I would still judge a half a radian to be significant (that said in all my glorious ignorance!)
(I may also be otherwise occupied for the rest of the day... but I am interested and open to understanding this) Thanks.
Half a radian is significant, but that only occurs when E/M waves are penetrating the material, not when eddy currents are being generated from within.
Jn