Of the following the radition having the maximum wavelength is

Options

A. UV
B. Radio wave
C. X - ray
D. IR

Explanation

To determine which radiation has the maximum wavelength from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Electromagnetic Spectrum**: The electromagnetic spectrum consists of various types of radiation arranged in order of increasing frequency and decreasing wavelength. The order from highest frequency (lowest wavelength) to lowest frequency (highest wavelength) is:
- Gamma rays
- X-rays
- Ultraviolet (UV) rays
- Visible light (which includes colors from violet to red)
- Infrared (IR) rays
- Microwaves
- Radio waves

2. **Identify the Relationship Between Wavelength and Frequency**: The frequency (ν) and wavelength (λ) of electromagnetic radiation are inversely related by the equation:
\[ c = νλ \]
where \(c\) is the speed of light. This means that as frequency increases, wavelength decreases, and vice versa.

3. **Determine the Wavelength of Each Type of Radiation**: From the spectrum:
- Gamma rays have the shortest wavelengths (around \(10^{-12}\) meters).
- X-rays have slightly longer wavelengths (around \(10^{-10}\) to \(10^{-8}\) meters).
- UV rays have wavelengths from about \(10^{-8}\) to \(10^{-7}\) meters.
- Visible light ranges from about \(10^{-7}\) (violet) to \(10^{-6}\) meters (red).
- Infrared rays have wavelengths from about \(10^{-6}\) to \(10^{-3}\) meters.
- Microwaves range from about \(10^{-3}\) to \(10^{-1}\) meters.
- Radio waves have the longest wavelengths, ranging from \(10^{-1}\) meters to kilometers.

4. **Compare the Wavelengths of the Given Options**: If the options include types of radiation such as gamma rays, X-rays, UV rays, visible light, microwaves, and radio waves, we can conclude that:
- Radio waves have the longest wavelengths among all types of electromagnetic radiation.

5. **Select the Correct Answer**: Based on the analysis, the radiation with the maximum wavelength is **radio waves**.

### Final Answer:
The radiation having the maximum wavelength is **radio waves**.

---