If the refractive index of medium b with respect to medium a and that of medium c with respect to medium b are given, then the refractive index of a medium c with respect to a medium a can be found by using the relation
`n_(ca)=n_(ba)xx`____.

Explanation

To find the refractive index of medium C with respect to medium A (n_CA), given the refractive index of medium B with respect to medium A (n_BA) and the refractive index of medium C with respect to medium B (n_CB), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- The refractive index of medium B with respect to medium A is given as \( n_{BA} \).
- The refractive index of medium C with respect to medium B is given as \( n_{CB} \).
- We want to find the refractive index of medium C with respect to medium A, denoted as \( n_{CA} \).
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