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If you want as much protection as Earth's atmosphere provides, 25 inches. At least that gives as much mass in between the card and space as the atmosphere does
by dzdt 11y ago
If you want as much protection as Earth's atmosphere provides, 25 inches. At least that gives as much mass in between the card and space as the atmosphere does. (1 atm is about 30in of mercury, lead is 11/13 as dense as mercury...)
- tracker1 11y agoBut it isn't just about mass, there's density to consider... we aren't sending up computing devices into space wrapped in 25 inches of lead... so I'm guessing that far less is actually needed.