BTW, it's not even 1 billionth of a metre thick. It's 200 nm. That's 0.2 microns. That's 2 * 10^-7. It's 0.2 of a millionth.
They should have just said 0.2 microns instead. It carries just as much actual meaning for the layperson, and it's a lot easier to parse if you are scientifically literate.
They should have just said 0.2 microns instead. It carries just as much actual meaning for the layperson, and it's a lot easier to parse if you are scientifically literate.