Bananas are slightly radioactive because they are rich in potassium, some isotopes of which are radioactive.
How many bananas would you need to eat to get the amount of radiation exposure you would have gotten 1km from ground zero when the Hiroshima bombing took place? 5, 50, 500, 5,000, or 50 million?
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I think it’s 5000
No they’re safer than that.
50 million
One banana is 0.1 microsieverts. The radiation in Hiroshima was 5 sieverts. That’s 50 million bananas which you would need to consume in a few seconds.
In other words, bananas are perfectly safe.
5,000
Not quite. Actually not especially close.