*Question T9A09:
What is the approximate length, in inches, of a half-wavelength 6 meter dipole antenna?*  

*Correct Answer is  C: 112*  

### AI Response: (may contain errors)  

To find the approximate length of a half-wavelength 6 meter dipole antenna, we can use the formula for the length of a dipole antenna:

$$
L = \frac{468}{f(MHz)}
$$

where:
- $L$ = length of the dipole in feet
- $f(MHz)$ = frequency in megahertz

For a 6 meter antenna, we first need to convert the length from meters to megahertz. The frequency corresponding to 6 meters is approximately 50 MHz (since 6 meters is in the 50 MHz amateur radio band).

Now, substituting into the formula:

$$
L = \frac{468}{50} \approx 9.36 \text{ feet}
$$

To convert feet to inches (since there are 12 inches in a foot):

$$
L_{inches} = 9.36 \times 12 \approx 112.32 \text{ inches}
$$

Thus, the approximate length of a half-wavelength 6 meter dipole antenna is about 112 inches.

### Explanation of Choices:
- **A: 6 inches**  
  This is far too short for a half-wavelength dipole at 6 meters. It does not reflect the correct calculation.

- **B: 50 inches**  
  This is also too short. It does not account for the correct frequency and wavelength relationship.

- **C: 112 inches**  
  This is the correct answer, as calculated above. It represents the proper length for a half-wavelength dipole at 6 meters.

- **D: 236 inches**  
  This is excessively long for a 6 meter dipole. It likely corresponds to a different frequency or misunderstanding of the wavelength calculation.

### Summary:
The correct answer is **112 inches** because it accurately reflects the calculated length of a half-wavelength dipole antenna for the 6 meter band, based on the frequency of approximately 50 MHz.