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A decibel may be defined as the ratio of input and output optical power for a particular optical wavelength.

A decibel may be defined as the ratio of input and output optical power for a particular optical wavelength. Correct Answer True

Signal attenuation refers to the loss in transmission and it needs a logarithmic unit to express. Decibel is mainly used for comparing two power levels. It has the advantage that the operations of multiplication and division reduce to addition and subtraction.

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