On July 6, 2005 (June 1, 2005 in the lunar calendar), world-famous physicist Huang Kun passed away. World-famous physicist, one of the founders of China's solid state physics and semiconductor physics, outstanding educator, academician of the Chinese Academy of Sciences, foreign academician of the Royal Swedish Academy of Sciences, academician of the Third World Academy of Sciences, member of the Fifth, Sixth, Seventh and Eighth Standing Committee of the National Committee of the Chinese People's Political Consultative Conference, outstanding member of the Communist Party of China, member of the Jiusan Society, recipient of the National "May Day" Labor Medal, recipient of the National Highest Science and Technology Award in 2001, and honorary director of the Semiconductor Research Institute of the Chinese Academy of Sciences Huang Kun died at 16:17 on July 6, 2005 in Beijing at the age of 86. Academician Huang Kun, born in Beijing in 1919, is a famous solid state physicist in China and a world-renowned physicist. He has made many pioneering and significant contributions in solid state physics, played an important role in promoting the development of solid state physics, and is the founder of semiconductor physics in China. Huang Kun has carried out pioneering work in some fields of solid state physics. In 1947, Huang Kun proposed the theory of X-ray diffuse scattering caused by impurity defects in solids, which has been confirmed and applied by some foreign scientists in the 1970s. It has become a powerful means to study impurity defects in solids, known as "yellow scattering". In 1951, Huang Kun proposed the coupled oscillation mode of phonons and electromagnetic waves in crystals. It was confirmed by Raman scattering experiments in 1963 and was named polaritons. Later, it was found that other matter vibrations also have similar coupling modes with electromagnetic waves, also known as polaritons. Now polaritons have become the basis for analyzing some optical properties of solids. The equation proposed by Huang Kun at that time was called the "Huang equation". Huang Kun and M. Born co-authored "Lattice Dynamics Theory" (DynamicalTheoryofCrystalLattices, published in 1954, translated into Russian in the Soviet Union in 1957), which is recognized as an authoritative work in this field. Since 1978, Huang Kun has made new progress in the study of solid theory. Among them, the proof of the equivalence of the adiabatic approximation and the static coupling theory of the non-radiative transition has clarified some fundamental problems in the development of the theory in this area internationally for more than 20 years. The statistical regularity of phonons in the non-radiative transition proposed by Huang Kun may open up new directions for research in this field. These results are attracting the attention of the international physics community. Comments: China Pride