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| Resource | Type | Best For | Link (Search) | | :--- | :--- | :--- | :--- | | | Free HTML/PDF | Quantum behavior, atoms | feynmanlectures.caltech.edu | | MIT OpenCourseWare – 8.421 | Lecture notes + assignments | Zeeman effect, fine structure | ocw.mit.edu | | NPTEL – Atomic & Molecular Physics | Video + Transcripts | Rotational & vibrational spectra | nptel.ac.in (search for course ID PHY-12) | The era of hunting for a specific, obscure
Rajkumar’s is one of the most popular standard textbooks for postgraduate students (M.Sc. Physics) and competitive exams like CSIR-NET, GATE, and JEST. : Numerous solved problems and topic-wise exercises are