CRITICAL ANGLE
\kɹˈɪtɪkə͡l ˈaŋɡə͡l], \kɹˈɪtɪkəl ˈaŋɡəl], \k_ɹ_ˈɪ_t_ɪ_k_əl ˈa_ŋ_ɡ_əl]\
Definitions of CRITICAL ANGLE
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By Princeton University
By DataStellar Co., Ltd