Which EM wave has the longest wavelength?

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Multiple Choice

Which EM wave has the longest wavelength?

Explanation:
The length of a wave increases as its wavelength grows, while frequency drops, since wavelength and frequency are inversely related. Among these options, radio waves sit at the far end of the spectrum with the longest wavelengths—ranging from millimeters up to kilometers—much longer than the others. Microwaves have shorter wavelengths (centimeters to millimeters), infrared is even shorter (roughly micrometers to millimeters), and ultraviolet is much shorter still (nanometers). Because radio waves have the lowest frequency and the longest wavelength in this group, they are the longest-wavelength EM waves shown.

The length of a wave increases as its wavelength grows, while frequency drops, since wavelength and frequency are inversely related. Among these options, radio waves sit at the far end of the spectrum with the longest wavelengths—ranging from millimeters up to kilometers—much longer than the others. Microwaves have shorter wavelengths (centimeters to millimeters), infrared is even shorter (roughly micrometers to millimeters), and ultraviolet is much shorter still (nanometers). Because radio waves have the lowest frequency and the longest wavelength in this group, they are the longest-wavelength EM waves shown.

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