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虚干涉与虚衍射是作者在长期教学实践中为便于学生全面理解干涉和衍射的意义而提出的。文中作了论证,并述说了如何理解其意义。
Virtual interference and virtual diffraction are the author’s long-term teaching practice in order to facilitate students to fully understand the significance of interference and diffraction. The article made a demonstration, and said how to understand its meaning.