Hi Sachin.

No, Fresnel's Bi-Prism is not included in JEE Mains syllabus. Checking the previous year questions of recent times also you can tell that questions from Fresnel's Bi-prism have not been asked in JEE Mains. From wave optics and diffraction in JEE Mains, only diffraction due to single slit and width of central maxima are in the syllabus.

All the best!

Hello.
Formerly This topics is not mentioned in the JEE mains syllabus of physics but you still can do this topic because sometimes you see out of syllabus questions in JEE mains exam so accordingly you can analyse previous year question papers of JEE mains and can see outcomes of this topic with respect to this analysis you can go for further desire .
You can see JEE mains syllabus of physics from the below link:
https://engineering.careers360.com/articles/jee-main-physics-syllabus/amp
Best of luck.

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