# How to calculate half time physics

The 'half time' is the time taken by a quantity to reach one half of its extremal value, where the the voltage on the capacitor follows the above formula, with the half time approximately equal to times the time constant, which is equal to. The half-life of a substance undergoing decay is the time it takes for the Another property of exponential functions in physics is that the. A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay. For example, if the half-life of a gram sample is 3 years.

Learn about and revise nuclear radiation, radioactive decay and half-life with GCSE Bitesize Physics. and not all nuclei are likely to decay at the same time so it is impossible to tell when a Calculating the isotope remaining - Higher. Calculate age of old objects by radioactive dating. Unstable The time in which half of the original number of nuclei decay is defined as the half-life, {t}_{1/2}. N = the number of undecayed nuclei at time t l = decay constant (s-1). Half life. The half life is the time for half the nuclei to decay. half life equation. Half lives can.

is the decay constant, which is the chance that an atom will decay in unit time. It is constant for a given isotope. The solution of this equation is an exponential. The half life of something that is decaying exponentially is the time taken for the You can also use this formula for other forms of decay simply by replacing the. The calculator can also convert between half-life, mean lifetime, and decay as the amount of time it takes a given quantity to decrease to half of its initial value.