Engineering, 10.12.2019 06:31 giulianna41
Calculate the emission spectrum of a gaas led with bandgap energy equal to 1.4 ev at 350k, assume the emission spectrum is given by n(e)=g(e)*f(e), with g(e)=(e-ec)^(1/2), f(e)=-e)/kt). then assuming the density states, fermi distribution and electron concentration are normalized so that the absolute amplitude value of it is not important. we are only interested in the shape of the spectrum. its absolute magnitude is not needed. (a) plot the density of states g(e) versus energy (ev) for wavelength ranged from 0.8um to 1.0 um (b) plot the distribution f(e) versus energy (ev) for wavelength ranged from 0.8um to 1.0 um (c) plot the electron concentration n(e) versus energy (ev) for wavelength ranged from 0.8um to 1.0 um (d) calculate the full-width-at-half-max linewidth (e) estimate the emission peak wavelength (in microns) and frequency (in thz)
Answers: 3
Engineering, 04.07.2019 18:10, meganwintergirl
Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise
Answers: 3
Engineering, 04.07.2019 18:10, qwertylol12345
Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.
Answers: 2
Engineering, 04.07.2019 18:10, jojoangelique13
The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m
Answers: 2
Calculate the emission spectrum of a gaas led with bandgap energy equal to 1.4 ev at 350k, assume th...
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