The intensity of light pulse travelling in an optical fiber decreases according to the relation `I=I_(0)e^(-alpha x)` . The intensity of light is reduced to `20%` of its initial value after a distance x equal to

The intensity of a light pulse travelling along a communication channel decreases exponentially with distance x according to the relation I=I_0 e^(-alpha x) , where I_0 is the intensity at x = 0 and alpha is the attenuation constant. What is the distance travelled by the wave, when the intensity reduces by 75% of its initial intensity?

The intensity of a light pulse travelling along an optical fibre decreases exponentially with distance according to the relation l = i_(0) e^(-0.0693x) where x is in km and l_(0) is intensity of incident pulse. The intensity of pulse reduces to (1)/(4) after travelling a distance

The intensity of a light pulse travelling along a communication channel decreases exponetially with distance x according to the relation I=I_(0)e^(-ax) where I_(0) is the intensity at x=0 and alpha is the attenuation constant. The percentage decrease in intensity after a distance of (("In"4)/(alpha)) is

(i) The intensity of a light pulse travelling along a communication channel decreases exponentially with distance x according to the relation I = I_0 e^(-alphax) , where I_0 is the intensity at x = 0 and alpha is the attenuation constant. Show that the intensity reduces by 75 percent after a distance of (ln 4)/(alpha) (ii) Attenuation of a signal can be expressed in decibel (dB) according to the relation dB = 10log_10 (I//I_0). What is the attenuation in dB//km for an optical fibre in which the intensity falls by 50 percent over a distance of 50 km?

(i) The intensity of a light pulse travelling along a communication channel decreases exponentially with distance x according to the relation I = I_0 e^(-alphax) , where I_0 is the intensity at x = 0 and alpha is the attenuation constant. Show that the intensity reduces by 75 percent after a distance of (ln 4)/(alpha) (ii) Attenuation of a signal can be expressed in decibel (dB) according to the relation dB = 10log_10 (I//I_0). What is the attenuation in dB//km for an optical fibre in which the intensity falls by 50 percent over a distance of 50 km?

If I is the intensity of light entering into the optical fibre and I_(e) is that emerging from the fibre then

If I is the intensity of light entering into the optical fibre and I_(e) is that emerging from the fibre then