Question
What is the formula for converting frequency to approximate wavelength in meters?
Answer Options
- A) Wavelength in meters equals frequency in hertz multiplied by 300
- B) Wavelength in meters equals frequency in hertz divided by 300
- C) Wavelength in meters equals frequency in megahertz divided by 300
- D) Wavelength in meters equals 300 divided by frequency in megahertz
Correct Answer: D
Explanation
The simple formula used to convert frequency (f) in megahertz (MHz) to an approximate wavelength (\lambda) in meters is: \text{Wavelength in meters} = 300 / \text{frequency in megahertz}.
This rule of thumb is derived from the fundamental relationship c = \lambda f (T3B05), using the approximation of 300,000,000 meters/second for the speed of light. For example, to find the approximate wavelength of 7 MHz: 300 / 7 \approx 42.8 \text{ meters} (the 40-meter band).
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