How many neutrinos pass through our body every second?

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How many neutrinos pass through our body every second?

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Answer 1 · 2016-04-24T11:41:27

About $600$ $600$ trillion

Explanation:

Approximately $6.33 \cdot 10^{14}$ $6.33*10^14$ neutrinos pass through $1 m^{2}$ $1m^2$ per second from a source $1 A U$ $1AU$ (astronomical unit) away

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

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 $0.88 m^{2}$ $0.88m^2$ .

Putting these numbers into a calculation

$(6.33 \cdot 10^{14} \frac{neu}{m^{2} s}) \cdot 0.88 m^{2} = 5.57 \cdot 10^{14} \frac{neu}{s}$ $(6.33*10^14"neu"/(m^2s))*0.88m^2=5.57*10^14"neu"/s$

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

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How many neutrinos pass through our body every second?

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