Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
6. (a) Draw detailed diagrams to illustrate the band structure of insulators, intrinsic semi- conductors and metals at room temperature, 300 K. Be sure to include an indication of (i) the band gap energy, (ii) the Fermi level and (iii) the occupied energy levels in each case. (b) Draw diagrams representing the following interactions between photons and electrons, in a two level system of energy E2 and E₁, and briefly discuss the factors which control the rates of the processes: (i) Absorption, (ii) Spontaneous emission, and (iii) Stimulated emission. (iv) Outline the differences between the photons emitted by processes (ii) and (iii).

6. (a) Draw detailed diagrams to illustrate the band structure of insulators, intrinsic semi- conductors and metals at room temperature, 300 K. Be sure to include an indication of (i) the band gap energy, (ii) the Fermi level and (iii) the occupied energy levels in each case. (b) Draw diagrams representing the following interactions between photons and electrons, in a two level system of energy E2 and E₁, and briefly discuss the factors which control the rates of the processes: (i) Absorption, (ii) Spontaneous emission, and (iii) Stimulated emission. (iv) Outline the differences between the photons emitted by processes (ii) and (iii).

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
See similar textbooks
icon
Related questions
Question
6. (a) Draw detailed diagrams to illustrate the band structure of insulators, intrinsic semi- conductors and metals at room temperature, 300 K. Be sure to include an indication of (i) the band gap energy, (ii) the Fermi level and (iii) the occupied energy levels in each case. (b) Draw diagrams representing the following interactions between photons and electrons, in a two level system of energy E2 and E, and briefly discuss the factors which control the rates of the processes: (i) Absorption, (ii) Spontaneous emission, and (iii) Stimulated emission. (iv) Outline the differences between the photons emitted by processes (ii) and (iii). (c) If the electric component of an EM wave in a medium is described by E(z,t)j = 0.12 sin((π/3 x 10) z - 100 t) V.m-¹ What is the amplitude, the frequency, f, and the wavenumber, k for this travelling wave? What is the velocity of the wave, and hence the refractive index of the medium? (d) (i) (ii) Give a brief description of the behaviour of dielectrics in an electric field and explain why, in the presence of a dielectric material the net electric field becomes E = Eo
Transcribed Image Text:6. (a) Draw detailed diagrams to illustrate the band structure of insulators, intrinsic semi- conductors and metals at room temperature, 300 K. Be sure to include an indication of (i) the band gap energy, (ii) the Fermi level and (iii) the occupied energy levels in each case. (b) Draw diagrams representing the following interactions between photons and electrons, in a two level system of energy E2 and E, and briefly discuss the factors which control the rates of the processes: (i) Absorption, (ii) Spontaneous emission, and (iii) Stimulated emission. (iv) Outline the differences between the photons emitted by processes (ii) and (iii). (c) If the electric component of an EM wave in a medium is described by E(z,t)j = 0.12 sin((π/3 x 10) z - 100 t) V.m-¹ What is the amplitude, the frequency, f, and the wavenumber, k for this travelling wave? What is the velocity of the wave, and hence the refractive index of the medium? (d) (i) (ii) Give a brief description of the behaviour of dielectrics in an electric field and explain why, in the presence of a dielectric material the net electric field becomes E = Eo
Expert Solution
steps

Step by step

Solved in 5 steps with 5 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Photoelectric
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS