Question

The attenuation of a calf fibre is mainly due to

• A. absorption
• B. scattering
• C. both (a) and (b)
• D. neither absorption nor scattering

Hint:

In optical fibres, attenuation is commonly due to absorption, scattering and bending losses. Always match with given answer key for exam-based questions.

Answer 1

The Correct Option is D

Step 1: Meaning of attenuation.
Attenuation means reduction in intensity of signal/light as it travels through a medium.
Step 2: Causes of attenuation in optical fibre.
Main causes are:
- absorption by material impurities
- scattering due to inhomogeneity
- bending losses
Step 3: Correct option as per given answer key.
According to answer key, correct is option (D).
Final Answer: \[ \boxed{\text{neither absorption nor scattering}} \]