Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum.

Options

A. `lamda_("x-rays")ltlamda_("micro waves")lt lamda_("radio waves")lt lamda_("visible")`
B. `lamda_("visible")gtlamda_("x-rays")gtlamda_("radio waves")gtlamda_("micro waves")`
C. `lamda_("radio waves")ltlamda_("micro waves") ltlamda_("visible")ltlamda_("x-rays")`
D. `lamda_("visible")ltlamda_("micro waves") ltlamda_("radio waves")ltlamda_("x-rays")`

Answer

To solve the problem of determining the correct order of wavelengths in different parts of the electromagnetic spectrum, we can follow these steps:

### Step 1: Understand the Electromagnetic Spectrum
The electromagnetic spectrum is a range of all the different frequencies of electromagnetic radiation. The spectrum is typically divided into several regions, which include, in order of increasing frequency (or decreasing wavelength):

1. Radio Waves
2. Microwaves
3. Infrared
4. Visible Light
5. Ultraviolet
6. X-rays
7. Gamma Rays

### Step 2: Identify Wavelength Ranges
Each region of the electromagnetic spectrum corresponds to a specific range of wavelengths. The general ranges are as follows:

- **Radio Waves**: Wavelengths greater than 1 mm (up to kilometers)
- **Microwaves**: Wavelengths from 1 mm to 1 meter
- **Infrared**: Wavelengths from 700 nm (0.7 µm) to 1 mm
- **Visible Light**: Wavelengths from approximately 400 nm (violet) to 700 nm (red)
- **Ultraviolet**: Wavelengths from 10 nm to 400 nm
- **X-rays**: Wavelengths from 0.01 nm to 10 nm
- **Gamma Rays**: Wavelengths less than 0.01 nm

### Step 3: Arrange the Regions by Wavelength
Now that we have the ranges, we can arrange the regions from longest to shortest wavelength:

1. **Radio Waves** (longest wavelength)
2. **Microwaves**
3. **Infrared**
4. **Visible Light**
5. **Ultraviolet**
6. **X-rays**
7. **Gamma Rays** (shortest wavelength)

### Step 4: Conclusion
Based on the arrangement, the correct order of wavelengths from longest to shortest is:

- Radio Waves > Microwaves > Infrared > Visible Light > Ultraviolet > X-rays > Gamma Rays

### Final Answer
The correct option relating to the wavelengths of different parts of the electromagnetic spectrum is:

**Radio Waves > Microwaves > Visible Light > X-rays**