Using the radar wavelength formula, what is the wavelength for X-band with a frequency of 9,375 MHz?

• A. 0.0032 m
• B. 0.032 m
• C. 0.32 m
• D. 3.2 m

Answer: (B)

Wavelength and frequency are linked by the speed of light: lambda = c / f. Here f is 9,375 MHz, which is 9.375 × 10^9 Hz, and use c ≈ 3.00 × 10^8 m/s. So lambda ≈ (3.00 × 10^8) / (9.375 × 10^9) ≈ 0.032 meters, or 3.2 centimeters. This value fits the X-band range, which corresponds to wavelengths of a few centimeters.