When a light wave is reflected at the interface between two semi-infinite media,the relative phase between the reflected and incident amplitudes is a fundamental optical effect.Another fundamental phase relation arises in a symmetric beam splitter between its reflection and transmission amplitudes.Both effects originate from the phase structure of wave scatter-ing,although their underlying connection is not always clearly understood.As a pedagogical investigation,this paper systematically analyzes these phase relations using simple one-dimen-sional potential models in quantum mechanics and provides intuitive physical explanations.For a symmetric square barrier,the reflected and transmitted amplitudes necessarily differ in phase by±π/2,with the reflection phase referenced at the interface on the incident side and the transmission phase referenced at the interface on the exit side.The result is further ex-tended to general symmetric barriers,for which the detailed form of the barrier determines only whether the phase difference is+π/2 or-π/2.The role of this phase structure in the second-order interference of two identical particles is then examined.Through this sequence of analysis,half-wave loss at a reflecting interface,the phase relation in a symmetric beam split-ter,and multiparticle quantum interference are incorporated into a unified wave-scattering framework.This treatment provides a useful pedagogical reference for related topics in quan-tum mechanics and optics courses.
The Experimental Physics Teaching Center of the Department of Physics at Tsing-hua University has carried out the improvementand teaching practice of a series of fundamen-tal physics experiment courses based on"integration of science and education"and a"modular platform".This paper elaborates on the overall design philosophy and teaching practices.Ef-forts have been strengthened in building research-oriented and challenging experimentssuch as coaxial photonic crystals and rotating fiber-optic interferometers.Open and transparent teach-ing platforms combining general-purpose instruments with self-developed modular has been a-dopted.A progressive"foundation-comprehensive-research"teaching model has been imple-mented to promote personalized teaching.Teaching practice shows that the courses have stim-ulated students'interest in learning and achieved positive results.
The Numerical Simulation Experimental Physics(NuSEP)platform has been in op-eration for more than two years since its launch in 2024.The most consequential development during this period has been the profound and structural transformation of education driven by arti-ficial intelligence,whose breadth and depth have far exceeded expectations.Against this background,this paper examines the development trajectory and application practices of the NuSEP platform,summarizes the experience gained and lessons learned,and discusses its future directions.
Against the backdrop of the rapid development of artificial intelligence,this paper points out the historical inevitability of exploring the long-term development trend of educa-tion and emphasizes that AI's influence on education is deepening continuously.In the future,AI will become the core leading force in education,and human teachers need to seek a path of symbiosis with AI.Combining Geoffrey Hinton's viewpoints with the national action plan for the in-depth implementation of the"AI Plus"initiative,the paper expounds the inevitability of human society's development of AI and the synchronization between the intellectualization of China's education and the construction of an education power.It corely analyzes AI's impact on the underlying logic of education:driven by their intellectual curiosity,students can com-plete the learning process from total ignorance to profound understanding through continuous interaction with AI,which will lead to the gradual replacement of education's knowledge-im-parting function by AI,and the core status of ability cultivation will also be weakened in the long run,thus bringing about qualitative changes to many elements of the traditional educa-tional model.As the general introduction to a series of papers,this paper clarifies the logical framework for the analysis of four dimensions,namely Future Teachers,Future Classrooms,Future Schools and Future Learning Centers,and the series will explore these four dimensions in the progressive order from the micro to the macro and from the partial to the whole,laying a theoretical foundation and providing a framework guide for the subsequent four studies.
The independent cultivation of top-notch innovative talents in basic sciences,partic-ularly in physics,is a critical factor determining China's technological competitiveness and long-term development.However,current talent cultivation faces multiple deep-rooted chal-lenges,including short-termism,exam-oriented education,cultural traditions that inhibit in-novation,hindered international exchanges,and the impact of artificial intelligence,which ur-gently call for systematic responses at both conceptual and institutional levels.This report summarizes the practical experiences of Tsinghua University's Top-notch Talent Program from Phase 1.0 to 2.0.It analyzes the current state of national talent cultivation,the contem-porary response to"Qian Xuesen's Question,"the characteristics of China's scientific pro-gress,and the in-depth reform of university teaching in the age of artificial intelligence.It also examines the deep-seated issues faced by physics top-notch talent training bases in talent culti-vation,including domestic and international social environments,the spiritual and intellectual dimensions of teachers and students,and artificial intelligence,and puts forward several guid-ing suggestions.This paper reproduces Academician Zhu Bangfen's entire report on cultiva-ting future-oriented original innovative talents centered on the core values of"independent spirit and free thought."
