Y. P. Varshni, whose full name is Yash Pal Varshni, is a prominent Indian physicist known for his contributions to condensed matter physics, particularly in the area of theoretical and experimental studies. He has made significant contributions to the understanding of various physical phenomena, including the properties of materials and semiconductor physics. Varshni is perhaps best known for the Varshni empirical relationship, which describes the temperature dependence of the bandgap energy in semiconductors.
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