- #1
dRic2
Gold Member
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Hi, I'm looking for a simple explanation of the meaning of the crow flight distance and why it is defined as the second moment of a probability distribution:
$$\bar r^2 = \int r^2 p(r)dr$$
Where ##p(r)## is the probability that a neutron is absorbed in the interval ##dr## near ##r##. And what exactly is the meaning of the second moment of a probability distribution ?
Thanks
Ric
$$\bar r^2 = \int r^2 p(r)dr$$
Where ##p(r)## is the probability that a neutron is absorbed in the interval ##dr## near ##r##. And what exactly is the meaning of the second moment of a probability distribution ?
Thanks
Ric