When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequecy as the incident frequecy. Explain why ?

Explanation

To explain why the reflected and refracted light both have the same frequency as the incident frequency when monochromatic light is incident on a surface separating two media, we can break down the reasoning into several steps:

### Step-by-Step Solution:

1. **Understanding Monochromatic Light**:
- Monochromatic light consists of waves of a single frequency. This frequency is determined by the source of the light.

2. **Incident Light on the Interface**:
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