It is something like I have a black box; maybe (Refer Slide Time: 29:34) I should use the black color for that black box here; something like I add wave number 1, wave number 2, wave number 3, etcetera; churn it out; outcome is the regular waves. Converse – I
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have irregular waves there; I have the mechanism; I just shake it; separates out all the regular waves. So, you see the idea of irregular wave therefore, is obtained by simply summing regular waves; and conversely, I can sum regular waves randomly to get irregular waves