Question

Attenuation of a signal is

Answer 1

Explanation,

1. Attenuation is a reduction of signal strength that occurs through any type of signal like analog or digital.
2. It is measured in Decibels ($dB$).
3. The attenuation is measured in decibels per foot in the case of fiber optics cable.
4. More the efficient cable lesser will be the attenuation per distance.
5. Repeaters are used when a signal is transmitted to long distances
6. This boosts the signal after reducing attenuation.
7. Attenuation coefficient is $\alpha =N_g{\sigma }_R$, $N_g$is the number density of the gas molecules and ${\sigma }_R$ is Rayleigh cross-section.