对实屏的夫琅禾费衍射中心亮点(亮纹)的半定性半定量论证
대실병적부랑화비연사중심량점(량문)적반정성반정량론증
The semi-qualitative and semi-quantitative demonstration for the centre light spot(or light fringe)of the Fraunhofer diffraction by a real obstacle screen
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