Question

what are the periodization of history??​

Answer 1

Periodization is the process or study of categorizing the past into discrete, quantified named blocks of time. This is usually done in order to facilitate the study and analysis of history, understanding current and historical processes, and causality that might have linked those events.

Answer 2

Answer:

the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.

change in direction of propagation of any wave as a result of its travelling at different speeds at different points along the wave front.

measurement of the focusing characteristics of an eye or eyes.