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light traveling in air strikes on the core area of the fiber end surface at an angle is 34.5 degree where it is measured btween the incoming ray and the surface of fiber end. upon striking the fiber , part is refracted. the reflected and the reflected and the refracted beams make an angle of 90 degree with ech other. The cladding index of refraction 1.44 and the core radius r= 30um. (a) what is the refractive index of the core of the fiber. (b) what are the NA and the maximum acceptance angle max of this fiber? (c) when light is coupled between two fibers, there can be an air gap between fibers. Explain how the refractive index matching angle1.4 can help to reduce the loss.
A Newton's ring apparatus is to be used to determine the radius of curvature of a lens (see the figure below and Problem 75). The radii of the nth and (n+16)th bright rings are measured and found to be 0.129 and 0.317 cm
Describe the characteristics of the series RC filter circuit with the output across the resistive component. Distinguish the pass and stop bands with reference to the cutoff frequency. Also, state what happens to the circuit complex impedance at t..
a beam of polarized light of intesity I0 passes through a sheet of ideal polarizing material. The polarization axis of the beam and the transmission axis of the sheet differ by 30 degrees. What is the intensity of emerging light
A solar cell with an area of 4 cm^2 has I-V characteristics under illumination from a 600 W source it drives a load of 5 ohms. calculate power delivered to load and efficiency of solar cell.
1) A 1.5H inductor has a constant current of 2.5A. a) find the energy that it holds b) what is its voltage c) what is its energy after its current drops to zero and stays zero What power is dissipated when a 20 olhm resistor is connected to it
Two loudspeakers, one of them generates sound 400W power the other with 100W. The sound is generated isotropically from each loudspeaker. A listener is seated 20 m from the 100 W loudspeaker and 40 m from the other loudspeaker.
A coil has an inductance of 400 mH and aresistance, RL, of 10 Ω. The coil is connected in series with a 100 Ω resistor Racross a 240V - 50Hz supply voltage V. Sketch the circuit diagram and phasor diagram; take V as the reference phasor.
A variable-frequency voltage source of value 12cos(wt) drives a network with a resistor of value 12 ohms, an inductor of value 50mH, and a capacitor of value 5uF, all in series, in that order.
(Probability of negative lifetime is negligible) Lifetime of chip 2 is also a Gaussian RV with mean 22,000 and standard deviation 1000 hours. Which is preferred if the target lifetime of the system is (i) 20,000 hours and (ii) 24,000 hours
Obtain a primitive flow table for an asynchronous circuit with two inputs, x1 and x2, and two outputs z1,z2 that operates according to the following specs: a) when x1x2 = 00, the output z1z2 = 00
What is the data rate of a digital electrical communication system that uses 16 voltage levels to carry multiple bits with one voltage level, where each voltage level is kept at that level for a duration of 2 ms
Need for radical future plans to alleviate the very real problem we are faced with in New Zealand and address this problem, by providing an answer to Transpower
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