The intensity of light pulse travelling in an optical fiber decreases according to the relation \I = \I_0 e^{-\\alphax} . The intensity of light is reduced to 20 % of its initial value after a distance x equal to

NEET 2021 Model Test Paper 3

Question : 34 of 180

Marks: +1, -0

The intensity of light pulse travelling in an optical fiber decreases according to the relation I=I0e−αx . The intensity of light is reduced to 20 % of its initial value after a distance x equal to

ln(
1
α
)
ln(α)
(
ln‌5
α
)
ln(
5
α
)

Validate

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