What is the wavelength of a 60 MHz radio wave?

What is the wavelength of a 60 MHz radio wave?

• A. 5 meters
• B. 2.5 meters
• C. 20 meters
• D. 60 meters

Answer: (A)

Wavelength is found by dividing how fast the wave travels by its frequency: λ = c / f. In air, radio waves travel essentially at the speed of light, about 3.0 × 10^8 m/s. For a frequency of 60 MHz (60 × 10^6 Hz), the wavelength is 3.0×10^8 / 60×10^6 = 5 meters. So the correct wavelength is 5 meters. The other numbers would correspond to different frequencies: 2.5 meters is half of that wavelength (a half-wavelength length), 20 meters would match around 15 MHz, and 60 meters would match around 5 MHz.

Wavelength is found by dividing how fast the wave travels by its frequency: λ = c / f. In air, radio waves travel essentially at the speed of light, about 3.0 × 10^8 m/s. For a frequency of 60 MHz (60 × 10^6 Hz), the wavelength is 3.0×10^8 / 60×10^6 = 5 meters.

So the correct wavelength is 5 meters. The other numbers would correspond to different frequencies: 2.5 meters is half of that wavelength (a half-wavelength length), 20 meters would match around 15 MHz, and 60 meters would match around 5 MHz.