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.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Declan Carroll

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

By signing up, you agree to our Terms of Service and Privacy Policy

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.