Which electromagnetic wave has the highest frequency?

Gamma rays have the highest frequency among the options listed because they are part of the electromagnetic spectrum characterized by extremely short wavelengths and high energy. The frequency of an electromagnetic wave is inversely related to its wavelength; as the wavelength decreases, the frequency increases. Gamma rays, which are produced by atomic and nuclear reactions, possess wavelengths shorter than those of X-rays, ultraviolet light, and visible light. This high frequency contributes to their ability to penetrate materials more effectively than other forms of electromagnetic radiation. Therefore, gamma rays occupy the upper end of the electromagnetic spectrum, making them the waves with the highest frequency in this context.