If the audio signal is transmitted directly into space, the length of transmitting antenna required will be

Options

A. extremely small
B. extremely large
C. infinitely large
D. none of these

Answer

To determine the length of the transmitting antenna required for transmitting an audio signal directly into space, we can follow these steps:

### Step 1: Understand the Relationship Between Antenna Length and Wavelength
The length of a transmitting antenna is directly proportional to the wavelength of the signal being transmitted. This means that as the wavelength increases, the required length of the antenna also increases.

### Step 2: Identify the Characteristics of Audio Signals
Audio signals typically have very low frequencies. The frequency of a signal is inversely related to its wavelength. Therefore, low-frequency signals correspond to very large wavelengths.

### Step 3: Apply the Relationship to Audio Signals
Since audio signals have low frequencies, we can conclude that they possess very large wavelengths. Given that the length of the antenna is proportional to the wavelength, we can infer that the length of the transmitting antenna required for audio signals will also be extremely large.

### Step 4: Conclusion
Based on the above reasoning, we can conclude that if an audio signal is transmitted directly into space, the length of the transmitting antenna required will be extremely large.

### Final Answer
The length of the transmitting antenna required will be extremely large.

---