Question
What do you mean by refractive index of a medium?
✓
Answer
- A ray of light that travels obliquely from one transparent medium into another will change its direction in the second medium.
- The extent of the change in direction that takes place in a given pair of media is expressed in term of the refractive index, the constant appearing in the equation $\frac{sin \ i}{sin\ r}=$ constant.
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