To solve the problem, we need to identify which type of electromagnetic radiation has the highest frequency.
1. Understanding the Electromagnetic Spectrum:
The electromagnetic spectrum consists of various types of electromagnetic radiation, which differ in frequency and wavelength. The higher the frequency, the shorter the wavelength and the more energy the radiation carries.
2. Ranking the Radiation Types by Frequency:
The order of electromagnetic radiation types from highest to lowest frequency is as follows:
- Cosmic rays have the highest frequency.
- X-rays have a lower frequency than cosmic rays but higher than ultraviolet rays.
- Ultraviolet (UV) rays come next in terms of frequency.
- Radio waves have the lowest frequency among these options.
Final Answer:
The type of electromagnetic radiation with the highest frequency is $ \mathbf{Cosmic \, rays} $.