Quote:
Originally Posted by Rupert
As Earth has a lot more than 1km of air, that doesn't follow.
|
I've seen other estimates for the 10 tons per square meter for radiation shielding. If air is 1.225 kg / m^3, then to get 10 tons worth, you need a depth of 7.4 km of such air. (This doesn't include air getting less dense at higher altitudes.)