Question

what's n0 in physics??​

Answer 1

Answer:

It is a term used in certain formulas

it's just a denoting letter

but mainly used in ray optics as refractive index

Answer 2

Answer:

Half-life t1/2 is the time in which there is a 50% chance that a nucleus will decay. The number of nuclei N as a function of time is N =N0e−λt, where N0 is the number present at t = 0, and λ is the decay constant, related to the half-life by \(\lambda=\frac{0.693}{t_{1/2}}\\\).