What is the frequency of a radio wave with a wavelength of 3 m? (Hint: MHz stands for megahertz or 1 million hertz)A.10 MHz (1 × 107 Hz)B.1 MHz (1 × 106 Hz)C.100 MHz (1 × 108 Hz)D.1000 MHz (1 × 109 Hz)SUBMITarrow_backPREVIOUS
Question
What is the frequency of a radio wave with a wavelength of 3 m? (Hint: MHz stands for megahertz or 1 million hertz)A.10 MHz (1 × 107 Hz)B.1 MHz (1 × 106 Hz)C.100 MHz (1 × 108 Hz)D.1000 MHz (1 × 109 Hz)SUBMITarrow_backPREVIOUS
Solution
The frequency of a radio wave can be calculated using the formula:
Frequency (f) = Speed of Light (c) / Wavelength (λ)
The speed of light is approximately 3 x 10^8 meters per second.
Given the wavelength (λ) is 3 meters, we can substitute these values into the formula:
f = (3 x 10^8 m/s) / 3 m = 1 x 10^8 Hz
However, the question asks for the answer in megahertz (MHz), and 1 MHz is equal to 1 x 10^6 Hz. Therefore, we need to convert hertz to megahertz:
1 x 10^8 Hz = 1 x 10^8 / 1 x 10^6 MHz = 100 MHz
So, the correct answer is C. 100 MHz (1 x 10^8 Hz).
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