wow that was hard. but yea im with ya all here. and dude, i think ur dad is crazy, unless you have a oldschool monitor that does emit radiation(we got one) even still its not enough to harm ya. so he his completely wrong, and if he thnks so, when he goes to bet trun ur pc back on and see what ur sister says. as for migranes. that could be sound related cause theyre both pretty loud, or she talks on the cellphone WAY too much, or listens to excessively loud music, those could give a migrane
*edit*
the thing that tv's microwaves' computers.etc do radiate is heat... and that cant do $#!t unless heat exaution, or dehydraton, but even thats pushin it to the edge