Question

radio waves travel at the speed of light, 300,000 km/s. the wavelength of a radio wave received at 100 megahertz is:

Answer 1

The wavelength of a radio wave received at a frequency of 100 megahertz is 3 × 10-³m.

HOW TO CALCULATE WAVELENGTH:

• The wavelength of the radio wave can be calculated by using the formula as follows:

λ = v/f

Where;

1. λ = wavelength (nm
2. v = speed of light (m/s)
3. f = frequency (Hz)

• According to this question, a wavelength of a radio wave received at a frequency of 100 megahertz.

• 100mHz = 1 × 10⁸Hz
• Speed of light is given as 300,000 km/s = 3 × 10⁵m/s

• λ = v/f

• λ = 3 × 10⁵ ÷ 1 × 10⁸

• λ = 3 × 10-³m

• Therefore, wavelength of a radio wave received at a frequency of 100 megahertz is 3 × 10-³m.

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