should anything else be studied before studying wave optics. please tell me from where i should study wave optics as i'm not at all confident in that chapter at all?

Wave optics is one of important topic where every year, you'll a definite portion of questions from it.

I sugggest \u to follow HC VERMA parts I and II which are the basic books,

If u find time and would like to go with basic concepts , theres always RESNIK and HALLIDAY for you

apart from this , plzz go through ARIHANT series and u r coaching center material

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regards

Ramesh