Which formula correctly calculates wavelength in meters from frequency in hertz?

Which formula correctly calculates wavelength in meters from frequency in hertz?

• A. Wavelength (meters) = 300,000,000 / Frequency (Hz)
• B. Wavelength (meters) = Frequency (Hz) / 300,000,000
• C. Wavelength (meters) = 3,000,000 / Frequency (Hz)
• D. Wavelength (meters) = Frequency (Hz) * 300,000,000

Answer: (A)

Wavelength and frequency are connected by the wave speed: lambda = c / f. Here c is the speed of light in vacuum, about 3.0 × 10^8 meters per second. Since frequency is in hertz (per second), dividing c by f gives a length in meters, which is exactly the wavelength. So the correct formula is Wavelength (meters) = 300,000,000 / Frequency (Hz). The other options don’t fit because they either invert the ratio, use an incorrect constant, or multiply instead of divide, which changes the units and the meaning of the result.

Wavelength and frequency are connected by the wave speed: lambda = c / f. Here c is the speed of light in vacuum, about 3.0 × 10^8 meters per second. Since frequency is in hertz (per second), dividing c by f gives a length in meters, which is exactly the wavelength. So the correct formula is Wavelength (meters) = 300,000,000 / Frequency (Hz). The other options don’t fit because they either invert the ratio, use an incorrect constant, or multiply instead of divide, which changes the units and the meaning of the result.