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The length of GaAs laser resonator is L = 165 um; the width and the thickness are W = 10 um and d = 0.1 um. Find the photon round - trip time in this resonator. The refractive index of GaAs is 3.7.
Calculate the extraction efficiency (in percentage) of flat - surface LED without any encapsulation (emits directly into the air). The LED is fabricated from material with the refractive index n = 2.3.
Assuming the bandgap of GaAs, Eg1 = 1.424 eV and that of AiAs, Eg2 = 2.671 eV, find the required AI - fraction x in AIxGa1As compound to fabricate the material for red light emission with the wavelength lambda = 652 nm.
What happens to the program counter (PC) when a subroutine is called. What register is used to keep track of the return point. What happens to the register that keeps track of the return point if a subroutine calls another subroutine
An AC synchronous motor operates at 1200 rpm on a 60 hz, 240 Vrms supply. The supply is changed to 50 hz, 240 Vrms, What is the mechanical rotational velocity when the motor reaches steady state
a) Design a minimum two-level NOR-gate network to realize the above function. b) Design a minimum three-level NOR-gate network to realize the above function.
a plane wave is obliquely incident onto the planar interface between mismatched, lossless, nonmagnetic, uniform media, yet undergoes no reflection. If incidence is at 54 degrees to the normal, at what angle to the normal does the transmitted wave ..
Shielding Effectiveness with copper and steel at equality, Determine the frequency at which two 1 mm thick shields, one made of copper and the other of steel
A) the current decreases by a factor of 1000 in .2s B) the time required for the current drop to half of its intial value is .1s less than the time required for it to drop one-quarter of its intial value.
Calculate the total complex power, total current drawn and the total power factor and Y-connected load with an impedance of (1+ j 6) ohm per phase,
use a third-order low pass filter with a -3dB frequency of 10 Hz to filter your signal. What sampling rate should you use to make sure any potentially aliasing frequencies are attenuated by at least -40 dB for a. A butterworth filter
write a subroutine in 68000 assembly language to add two 32-bit packed BCD numbers. BCD number 1 is stored at a location starting from $ 500000 through $ 500003, with the least significant digit at $ 500003 and the most significant digit.
The Russian president and the Chinese counterpart need to come to an agreement by telephone. Neither can speak and understand each other's language. They need to employ translators. Compare this layered communication to OSI layers.
A light comes on in a storeroom when either (or both) of two doors is open. 1. What logic function is most suitable for this operation 2. Draw a circuit to represent each function using a logic gate
Suppose a 12-V battery bank rated at 200 Ah under standard conditions needs to deliver 600 Wh over a 12-h period each day. If they operate at -10 Celsius, how many days of use would they be able to supply
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