ifos • paper_1 • waves_oscillations
[UPSC IFoS 2025] Diffraction (Q230, 8+2=10M)
Within the framework of the Cornu's spiral, describe the intensity distribution at an arbitrary point \text{P} when a plane wave is incident normally on a long narrow slit of width \text{b}. For this case, under what condition will the diffraction pattern be of Fraunhofer type?
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