the attenution in optical fibre is mainly due to

Options

A. absorption
B. scattering
C. neither absorption nor scattering
D. both (1) and (2)

Answer

### Step-by-Step Solution:

1. **Understanding Attenuation**:
- Attenuation in optical fibers refers to the loss of light energy as it travels through the fiber. This loss can affect the quality and strength of the signal being transmitted.

2. **Identifying Causes of Attenuation**:
- The main causes of attenuation in optical fibers are absorption and scattering.
- Absorption occurs when some of the light energy is absorbed by the material of the fiber itself, converting it into heat.
- Scattering happens when light rays deviate from their original path due to imperfections or irregularities in the fiber material.

3. **Conclusion**:
- Therefore, we conclude that the attenuation in optical fibers is mainly due to both absorption and scattering of light energy.

4. **Final Answer**:
- The correct answer is that the attenuation in optical fiber is mainly due to absorption and scattering.