Which of the following has the largest wavelength?

Options

A. Radiowave
B. x-rays
C. Ultraviolet ray
D. Infra-red ray

Answer

To determine which of the given options has the largest wavelength, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Electromagnetic Spectrum**: The electromagnetic spectrum consists of various types of waves arranged in order of increasing frequency and decreasing wavelength. The order from longest wavelength to shortest wavelength is:
- Radio Waves
- Infrared Waves
- Visible Light
- Ultraviolet (UV) Rays
- X-rays
- Gamma Rays

2. **Identify the Given Options**: The options provided in the question are:
- Radio Waves
- X-rays
- UV Rays
- Infrared Rays

3. **Compare the Wavelengths**: From the electromagnetic spectrum, we can see that:
- Radio Waves have the longest wavelength.
- Infrared Waves have a shorter wavelength than Radio Waves but longer than visible light.
- UV Rays have a shorter wavelength than Infrared Waves.
- X-rays have an even shorter wavelength than UV Rays.

4. **Conclusion**: Since Radio Waves have the longest wavelength compared to the other options listed (X-rays, UV Rays, and Infrared Rays), we conclude that:
- **Radio Waves have the largest wavelength among the given options.**

### Final Answer:
**Radio Waves have the largest wavelength.**

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