How many neutrinos pass through our body every second?

Answer 1

About #600# trillion

Approximately #6.33*10^14# neutrinos pass through #1m^2# per second from a source #1AU# (astronomical unit) away

The average adult human body has a surface area between #1.6# and #1.9m^2#, generally greater in males than females. We can take the average as #1.75m^2#.

However, not all of the body is exposed directly to the sun. We can approximate that about half of it is face-on, which is #0.88m^2#.

Using these figures in a computation

#(6.33*10^14"neu"/(m^2s))*0.88m^2=5.57*10^14"neu"/s#

This is a very rough guess, but based on this I'd say between around #600# trillion neutrinos per second pass through us.

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Answer 2

Declan Carroll

Every square centimeter of your body is exposed to about 65 billion neutrinos every second.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.