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本文通过有机玻璃中的纵波声速随温度的变化来计算第一、二临界角随环境温度的变化。结果表明,随着环境温度的降低,第一、二临界角均明显增大。
In this paper, through the plexiglass longitudinal wave velocity with temperature changes to calculate the first and second critical angle with the ambient temperature changes. The results show that as the ambient temperature decreases, the critical angles of the first and second phases both increase obviously.