Gamma rays.
If by greatest frequency you mean highest frequency, we know that the upper end of the electromagnetic spectrum has the greatest frequency. This is the home to the gamma rays. They have the highest frequency, shortest wavelength, and the greatest energy.
Gamma rays have the shortest wavelength. Electromagnetic wave is a kind of energy being propagated even through free space (vacuum). It is classified based on the mode of producing it as Radio waves, micro waves, infra red, visible, ultra violet, X-ray and Gamma ray. Out of these seven, radio waves have the lowest frequency and Gamma ray has the highest frequency. As frequency and wavelength are inversely related, radio wave would have the longest wavelength.
As you go farther right down the spectrum (radio waves, microwaves, infrared waves, visible light, ultraviolet light, x-rays, and gamma rays), the waves' wavelengths decrease as their frequencies decrease. For example, x-rays have a shorter wavelength and higher frequency than ultraviolet light. Radio waves on the left end have the longest wavelength and shortest frequency, while gamma rays on the right end have the shortest wavelength and highest frequency.
They're not comparable. -- Cosmic rays are high-energy charged particles moving at less than the speed of light, with mass and kinetic energy but no characteristic frequency or wavelength. -- Gamma rays are electromagnetic radiation.
Generically speaking, radio waves have the longest wavelength and gamma rays have the highest energy.
Gamma rays emit the highest frequency.
Gamma rays have the highest frequency among the electromagnetic spectrum. They have the shortest wavelengths and carry the most energy.
The highest frequency electromagnetic waves are gamma rays.
the answer is gamma rays
There is no such thing as the highest frequency. Since photons or electromagnetic travel at the speed of light its frequency correlates to the energy. The highest energy, and thus the highest frequency, is found in cosmic radiation, where a single photon may carry many millions of kiloelectronvolts.
Gamma Rays are the highest frequency waves. Lower than that are X-rays then Ultraviolet. Then visible light, infrared, microwave, and radio waves are the lowest frequency. Here is a link which gives more information http://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html
Gamma rays have the highest frequency among gamma rays, infrared waves, and radio waves.
The highest frequency in the electromagnetic spectrum is gamma rays. Gamma rays have the shortest wavelengths and highest energy of all electromagnetic waves. They are produced by nuclear reactions and radioactive decay.
In the electromagnetic spectrum Gamma radiation has the highest frequency.
The highest frequency in the electromagnetic spectrum is found in gamma rays. These rays have the shortest wavelengths and the highest energy levels of all electromagnetic waves.
Gamma Rays
Gamma rays have the highest frequency among the electromagnetic spectrum, followed by X-rays and ultraviolet rays.