折射率o既高低係因咩而定?e.g.密度???
sound穿過0度空氣比穿過15度空氣慢?點解??
咁速度又係因咩而定???
唔該解答...thx~~~~~~
更新1:
咁點解sound穿過固體or液體會比穿過氣體快??? 固體有多o的能量????
更新2:
唔同溫度唔係都有唔同o既折射率咩??? 唔係點會出現"海視神樓"??