Why is the transmission of signals using sky waves restricted to frequencies upto 30 mega hertz?

Explanation

To understand why the transmission of signals using sky waves is restricted to frequencies up to 30 MHz, we can break down the explanation into a few key steps:

### Step-by-Step Solution:

1. **Understanding Sky Waves**:
- Sky waves are radio waves that are transmitted from the ground and are reflected back to Earth by the ionosphere, allowing for long-distance communication.

2. **Role of the Ionosphere**:
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