利用小角度近似测定水的折射率

Measurement of the index of refraction has longbeen a standard experiment in the introductory labora-tory.We have developed a variation of this experimentthatrequires only a series of length measurements andutilizes the small- angle approximation.It is a simplealternative to the more conventional laboratory exer-cise in which,for example,one uses a ruler and pro-tractor to measure the angles at which a ray entersand leaves a block of glass.Our method typically givesa refractive index of water …