Which of the following has minimum wavelength?

Options

A. `X-rays`
B. ultraviolet rays
C. `gamma-rays`
D. Cosmic rays

Answer

To determine which of the given options has the minimum wavelength, we can analyze the wavelength ranges of different types of electromagnetic radiation. Here’s a step-by-step solution:

### Step 1: Identify the Wavelength Ranges
We need to know the approximate wavelength ranges for the different types of electromagnetic radiation mentioned in the question. The common types include:

- **Gamma Rays**: Approximately \(10^{-12}\) meters
- **X-Rays**: Approximately \(10^{-10}\) meters
- **Ultraviolet (UV) Rays**: Approximately \(10^{-8}\) meters
- **Cosmic Rays**: Approximately \(10^{-14}\) meters

### Step 2: Compare the Wavelengths
Now, we will compare the wavelengths of these types of radiation:

- Gamma Rays: \(10^{-12}\) meters
- X-Rays: \(10^{-10}\) meters
- UV Rays: \(10^{-8}\) meters
- Cosmic Rays: \(10^{-14}\) meters

### Step 3: Determine the Minimum Wavelength
From the comparison, we can see that:

- Cosmic Rays have the smallest wavelength at \(10^{-14}\) meters.
- Gamma Rays have a larger wavelength than Cosmic Rays at \(10^{-12}\) meters.
- X-Rays and UV Rays have even larger wavelengths.

### Conclusion
Thus, the type of radiation with the minimum wavelength is **Cosmic Rays**.

### Final Answer
**Cosmic Rays have the minimum wavelength.**

---