Question: When a Newtons ring apparatus (Fig. 24-31) is immersed in a liquid, the diameter of the eighth dark ring decreases from 2.92cm to 2.48cm, what

When a Newton’s ring apparatus (Fig. 24-31) is immersed in a liquid, the diameter of the eighth dark ring decreases from 2.92cm to 2.48cm, what is the refractive index of the liquid?

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