The speed of an electromagnetic wave in a material medium is given by `n=(1)/(sqrt(mu epsilon)),` m being the permeability of the medium and e its permittivity. How does its frequency change ?

Explanation

To solve the question regarding how the frequency of an electromagnetic wave changes when it travels from one medium to another, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Relationship**: The speed of an electromagnetic wave in a medium is given by the equation:
\[ n = \frac{1}{\sqrt{\mu \epsilon}} \]
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