class notes
These notes explain the **basic concepts of Laser (Light Amplification by Stimulated Emission of Radiation)** in a simple and easy-to-understand way. The notes cover important topics such as the **principle of laser, stimulated emission, population inversion, metastable state, and different types of lasers**. Diagrams and clear explanations are included to help students understand the working mechanism of lasers. These notes are useful for **Physics and Engineering students**, especially for exam preparation, quick revision, and conceptual understanding. The content is well-organized and suitable for **college-level studies, competitive exams, and semester examinations**.
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