An example of einsteinium chemical studies is the chemical consequences of radioactive decay. With the relatively short half-life of Es-253 (20.47 days) one can study the in-growth of daughter Bk-249 (half-life 330 days) and grand-daughter Cf-249 (half-life 351 years).
The wave period is the measure of time it takes for the weave cycle to complete. We usually measure the wave period in seconds and represent it with the letter T. Before we find the period of a wave, it helps to know frequency of the wave, that is the number of times the wave cycle repeats in a given time period.
This is the highest part of the wave above still water level. See also Crest. Peak Direction. This is the wave direction at the frequency at which a wave spectrum reaches its maximum. Peak Period / Wave Period. This represent the period of time it takes for consecutive wave crests or wave troughs to pass a given point. The greater the wave period is the better the swell. Refraction