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a) Consider three dielectric media with flat and parallel boundaries with refractive indices n1, n2, and n3. Show that for normal incidence the reflection coefficient between layers 1 and 2 is the same as that between layers 2 and 3 if\(n_2=[n_1n_3]^.5\)What is the significance of this result?
b) Consider a Si phtodiode that is designed for operation at 900 nm. GIven a choice of two possible AR coatings, SiO2 with a refractive ndex of 1.4 and TiO2 with a refractive index of 2.3, which would you use and what would be the thickness of the AR coating? The refractive index of Si is 3.5. Explain your decision.
c) COnsider a Ge photodiode that is designed for operation around 1200 nm. What are the best AR coating refractive index and thickness if the refractive index of Ge is about 4.0?
A machine produces photo detectors in pairs. Tests show that the first photo detector is acceptable with probability 3/5. When the first photo detector is acceptable, the second photo detector is acceptable with probability 4/5.
Calculate the probability that the system will fail in 3,000 hours. Supposing no failure of any component occurs in 5,000 hours of operation. What would be your revised estimate of failure rates of the components in your system?
Design a DC power supply that provides -95v +/- 5v to a 2 amp load (energy absorber). The input source is a 100 volt peak sinusoid, 60 Hz. You may use any circuit element we've studied. State the values of all circuit elements
An FM signal being transmitted is represented by eFM(t) = 50Sin((2)(95.1)(106)t+2Sin((2)(10)(103)t)). If the antenna impedance is 75 , determine: (a) total power in FM signal and (b) FM modulation index.
A balanceed three-phase load of 15 MA with a lagging load factor of 0.85 is supplied by a 115KV subtransmission line. if the line impedance is 50+j100Ohm per phase, determine the following: (a) The line current of the load
A first-order circuit, having a gain of 10 at dc and a gain of 1 at infinite frequency, has its pole at 20 kHz. Find its transfer function.
In a balanced three-phase wye-wye system, the load impedance is 10 +j1 Ohms. The source has phase sequence abc and the line voltage Vab = 220 Vrms /30°. The load voltage is VAN = 120 Vrms /0°.
Define static electricity and State five sources of static electricity and Describe three methods used to reduce hazards due to static electricity
find the transfer function and resolution for a 10-turn, 4.7k potentiometer with 3450 degrees of rotation and a 0 to 5 volt output. calculate the resolution in ohms per volt
calculate the short-circuit current of a three-phase delta-wye connected transformer if the short circuit occurs between phase A and the neutral at the low voltage side, and the transformer is supplied by a 13 kV line-to-line voltage.
Boron donor atome at a concentration of 10^15 cm^-3 are distributed uniformley throughout a silicon sample. The sample is then also doped with 6*10^15 cm^-3 of phosphorous. calculate the position of the Fermi level
A plant has two identical standby generator units for emergency power use. In the area of the generators, the normal noise level registers 81 dBA on the sound-level meter with the generators turned off. When one generator switches on, the noise le..
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