cse • paper_1 • waves_oscillations[UPSC CSE 2010] Diffraction (Q266, 20M)Obtain the expression for the primary focal length of Fresnel zone plate. Discussion (0)Sign in to post a solution, derivation, or discussion.Sign In to ReplyNo comments yet. Start the conversation!Document & Diagram ScannerClean whiteboard & high-contrast scan with automatic image enhancement✕Filter:🌟 Whiteboard📄 Document B&W🎨 Original-- × -- pxCompressed: -- KB--% saved
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