A wave of infrared light has a speed of 6 meters per second and a wavelength of 12 m What is the frequency of this wave?

Use the wave relationship speed = frequency × wavelength, so frequency = speed ÷ wavelength. With a speed of 6 meters per second and a wavelength of 12 meters, the frequency is 6 ÷ 12 = 0.5 Hz. Therefore, the correct choice is 0.5 Hz.

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