Which type of wave has the highest frequency within the electromagnetic spectrum?

The correct answer is X-ray. X-rays are part of the electromagnetic spectrum and are known for having a much higher frequency than infrared, ultraviolet, and radio waves. In the context of the electromagnetic spectrum, frequency is inversely related to wavelength; therefore, as frequency increases, the wavelength decreases. X-rays are highly energetic and fall between ultraviolet light and gamma rays, making them capable of penetrating various materials, which is why they are commonly used in medical imaging.

Infrared waves have lower frequencies and longer wavelengths compared to X-rays, which positions them further down the spectrum. Ultraviolet light also has higher frequencies than infrared but is still not as high as that of X-rays. Radio waves have the longest wavelengths and correspondingly the lowest frequencies of the options provided, placing them at the opposite end of the spectrum from X-rays. This hierarchical arrangement of frequencies helps explain their unique properties and applications in different fields, such as medicine and communication.