Electromagnetic radiation of highest frequency is

Options

A. infrared radiations
B. visible radiation
C. radio waves
D. `gamma`-rays

Answer

To determine which type of electromagnetic radiation has the highest frequency among the given options (infrared, visible, radio, and gamma), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Electromagnetic Spectrum**: The electromagnetic spectrum is a range of all types of electromagnetic radiation, which includes various categories such as radio waves, microwaves, infrared, visible light, ultraviolet (UV), X-rays, gamma rays, and cosmic rays.

2. **Identify the Order of Frequencies**: The electromagnetic spectrum is organized in order of increasing frequency (and energy). The general order from lowest to highest frequency is:
- Radio waves
- Microwaves
- Infrared
- Visible light
- Ultraviolet (UV)
- X-rays
- Gamma rays
- Cosmic rays

3. **Determine the Highest Frequency**: From the order established, we can see that gamma rays are located at the far right of the spectrum, indicating they have the highest frequency compared to the other types of radiation listed.

4. **Apply the Relationship Between Frequency and Energy**: The energy of electromagnetic radiation is directly proportional to its frequency, given by the equation:
\[ E = h \nu \]
where \(E\) is energy, \(h\) is Planck's constant, and \(\nu\) is frequency. Since gamma rays have the highest frequency, they also possess the highest energy.

5. **Conclusion**: Based on the analysis of the electromagnetic spectrum and the relationship between frequency and energy, we conclude that the electromagnetic radiation with the highest frequency among the options provided is gamma rays.

### Final Answer:
The electromagnetic radiation of highest frequency is **gamma rays**.

---