There are three wavelengths, `10^(6)m, 10^(-10) m and 10^(-7)` m find their respective names :

Options

A. Radio waves, X-rays, visible rays
B. X-rays, visible rays, Radio waves
C. X-rays, -rays, visible rays
D. Visible rays, -rays and X-rays

Answer

To find the respective names of the given wavelengths \(10^{6} \, \text{m}\), \(10^{-10} \, \text{m}\), and \(10^{-7} \, \text{m}\), we will categorize them based on the electromagnetic spectrum.

### Step-by-Step Solution:

1. **Identify the Wavelengths**:
- We have three wavelengths:
- \( \lambda_1 = 10^{6} \, \text{m} \)
- \( \lambda_2 = 10^{-10} \, \text{m} \)
- \( \lambda_3 = 10^{-7} \, \text{m} \)

2. **Determine the Category for \( \lambda_1 = 10^{6} \, \text{m} \)**:
- The wavelength \(10^{6} \, \text{m}\) is equivalent to 1 km.
- This falls within the range of radio waves, which typically have wavelengths from about \(10^{3} \, \text{m}\) (1 km) to \(10^{7} \, \text{m}\) (100 m).
- **Conclusion**: \(10^{6} \, \text{m}\) is classified as a **Radio Wave**.

3. **Determine the Category for \( \lambda_2 = 10^{-10} \, \text{m} \)**:
- The wavelength \(10^{-10} \, \text{m}\) is equivalent to 0.1 nm (nanometers).
- This wavelength falls within the range of X-rays, which typically range from about \(10^{-9} \, \text{m}\) (1 nm) to \(10^{-11} \, \text{m}\) (0.1 nm).
- **Conclusion**: \(10^{-10} \, \text{m}\) is classified as an **X-Ray**.

4. **Determine the Category for \( \lambda_3 = 10^{-7} \, \text{m} \)**:
- The wavelength \(10^{-7} \, \text{m}\) is equivalent to 100 nm.
- This wavelength falls within the visible light spectrum, which ranges from approximately \(400 \, \text{nm}\) (violet) to \(700 \, \text{nm}\) (red).
- **Conclusion**: \(10^{-7} \, \text{m}\) is classified as **Visible Light**.

### Final Summary:
- \(10^{6} \, \text{m}\) → **Radio Wave**
- \(10^{-10} \, \text{m}\) → **X-Ray**
- \(10^{-7} \, \text{m}\) → **Visible Light**