Lecture 1 | Introduction to Approximation Methods for Stationary States | Perturbation, Varian, WKB

🎥 *Introduction to Approximation Methods in Quantum Mechanics*
Welcome to the first lecture in our series on approximation techniques, inspired by *Zettili’s Quantum Mechanics*. In this video, we set the stage for three powerful tools used when exact solutions are hard to find:

🔹 *Perturbation Theory*
🔹 *Variational Method*
🔹 *WKB Approximation*

These methods are not just theoretical—they're essential for tackling real-world quantum systems and frequently appear in exams like **CSIR-NET (JRF)**, **GATE**, and **JEST**.

🧠 *What You'll Learn in This Lecture:*
✔️ Why approximation methods are necessary
✔️ Where and how each method applies
✔️ A roadmap for the upcoming lectures

📌 Perfect for aspirants preparing for competitive physics exams or anyone trying to strengthen their understanding of quantum mechanics beyond the basics.

💬 *Let’s Interact!*
Got a question or topic you want covered in detail? Drop it in the comments — I’m here to help!

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