*Question T3B05:
What is the relationship between wavelength and frequency?*  

*Correct Answer is  B: Wavelength gets shorter as frequency increases*  

### AI Response: (may contain errors)  

The correct answer is **B: Wavelength gets shorter as frequency increases**. 

### Explanation of the Correct Answer:
- The relationship between wavelength ($\lambda$) and frequency ($f$) is described by the formula:

$$
\lambda = \frac{c}{f}
$$

where:
- $\lambda$ = wavelength (in meters)
- $c$ = speed of light (approximately $3 \times 10^8$ meters/second)
- $f$ = frequency (in hertz)

From this formula, we can see that as frequency ($f$) increases, the wavelength ($\lambda$) decreases. This means that higher frequencies correspond to shorter wavelengths.

### Why the Other Choices are Incorrect:
- **A: Wavelength gets longer as frequency increases**  
  This is incorrect because, as established by the formula, an increase in frequency results in a decrease in wavelength.

- **C: Wavelength and frequency are unrelated**  
  This is incorrect because wavelength and frequency are directly related through the speed of light. Changes in one will affect the other.

- **D: Wavelength and frequency increase as path length increases**  
  This is misleading. While path length can affect signal propagation, it does not inherently change the wavelength or frequency of a signal. Wavelength and frequency are determined by the source of the signal and the medium through which it travels, not by the distance it travels.

### Summary:
- Remember the formula $\lambda = \frac{c}{f}$ to understand the inverse relationship between wavelength and frequency. Higher frequency means shorter wavelength, which is crucial for understanding radio wave propagation and antenna design.