A wave of infrared light has a speed of 6 m/s and a wavelength of 12 m. What is the frequency of this wave?

Use the wave equation: frequency equals speed divided by wavelength. Here, 6 m/s ÷ 12 m = 0.5 s⁻¹, which is 0.5 Hz. Therefore, the correct choice is A) 0.5 Hz.

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