AP3272
Assignment 2 (Due: Week 9)
Coverage:
Topic 1.4-2.2
Fermi energy
Estimate the Fermi energy for silver assuming 6.1 x 1022 free electrons per cubic
centimeter. (Assume the effective mass equals the free electron mass)
. Intrinsic semiconductor
Calcu
AP3204 WAVE & OPTICS: Topic 4 (1/4)
LIGHT WAVES
Reflection,
Refraction,
Polarization.
http:/www.physics.nad.ru/Physics/English/optics.htm
Properties of light :
Reflection, the way light
traveling is changed when it
strikes a surface;
Refraction, the
AP3204 WAVES & OPTICS
Topic 2 (1/3)
Waves
Definition,
the wave equation,
representations
properties and
wave at a boundary
1
Waves
Q
What is the connection between wave
and vibration?
Wave Definition
1. Waves are produced by vibrations and
disturbances.
w
AP3204 - WAVES & OPTICS
Topic 2(2/3)
WAVE BEHAVIOUR
Interference,
Standing Waves, and Beats
Wave Packet
1
Review of Topic 2(1/3)
Wave classification
1. Longitudinal waves
2. Transverse waves
The wave equation
2 y
1 2 y
=
x 2
v 2 t 2
The solution
y
P
Sourc
AP3204 Topic 1 (2/2)
VIBRATIONS
Free,
damped and
forced
DAMPED OSCILLATIONS
Affected by frictional or viscous
forces that will oppose the motion.
If left alone, a vibration will
continuously lose energy and will
eventually die out.
Fr r x
r: coefficient
AP3204 WAVES & OPTICS
Topic 2 (1/3)
Extra reading
More about impedance of stretched string
More about wave at a boundary
More about
Impedance of Stretched String
There is
T
Z v
v
Q
Q
How is the equation obtained?
What are T and v?
Impedance of Stretched
The Trillion Dollar Question
Planck and Einstein shows that light, which
classically is a wave, can behave like particles.
Can material particles exhibit
wave characteristics?
Yodh
1
De Broglie Particle-Wave
In 1924, he wrote his doctoral thesis
entitled
Assignment-2
Q 1.
A wave in a string is described by: y = 15 sin [(/16)(2x 64t)].
Calculate.
The maximum transverse velocity of a point on the string.
The transverse velocity at x = 6 cm when t = 0.25 s.
Q 2.
Two harmonic waves travelling in opposite dire
AP3204 Topic 1 (1/2)
VIBRATIONS
Free
damped and
forced
Examples
2. Compound pendulum
1. Simple pendulum
4.Torsional Pendulum
3. Mixed modes
1
Examples
5. Between two atoms
6. LCR circuit
7. piston moving in a cylinder
8. A mass attached to a spring on a
f
AP3204 WAVE & OPTICS
Topic 3
Electromagnetic Waves
Electromagnetic
Waves
Maxwells equations
Plane EM waves,
Energy and momentum
EM generation
Photon and light
1
The family of EM waves
The electromagnetic spectrum
EM vs mechanical waves
mechanical waves
EM
AP3204 WAVES & OPTICS
LIGHT WAVES
Topic 4 (2/4)
Interference of Light waves
1
Review: Wave behavior [Topic 2(2/3)] - Interference
Interference
Superposition Principle:
When two or more waves move in the same
linear medium,
the net displacement of the medi
Assignment-1
SHM
1. At t = 0 a particle moving with S.H.M. is at x = 2 cm. Its velocity v = 24 cms1. If the
periodic time for the vibration is 0.5s find:
(a) The phase constant;
(b) The amplitude;
(c) The displacement, velocity and acceleration as functio
AP4254 Assignment #1
2016
Due Date: Friday September 23, 2016 Assignment Collection Box
Question 1: Show how to go from the differential form to the integral form of Maxwells four
equations.
Question 2: Show that the function E = E 0 e
2E = 0 0
i ( k z z
AP4254 Lecture 09
Laser Resonators, Cavity Modes and
Gaussian Beams
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
In the previous lectures, we have studied two out of the three basic
components of a La
AP4254 Lecture 05
Radiation Transitions and Radiation in
Thermal Equilibrium
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
In Lecture 4, we dealt with energy levels of molecules and solids and
discusse
AP4254 Lecture 03
Particle Nature of Light
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
Introduction
Failures of the Classical Physics/Wave Theory of
Radiations.
The introduction of quantized energy s
AP4254 Lecture 06
Emission Broadening, Linewidth, Gain and
Absorption
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
In Lecture 5, we presented the QM description of the natural emission
linewidth of th
AP4254 Lecture 02
Fundamental Wave Properties of Light
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
Reviews
Maxwells Equations
Gauss, Strokes theorems, vector calculus, & EM
Properties.
Integral and d
AP4254 Lecture 07
Gain Threshold and Saturation. Laser
Oscillation.
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
In Lecture 6, we presented the classical interpretation of linewidth and
introduced two
AP4254 Lecture 08
Requirements for Obtaining Population
Inversions and Pumping Techniques
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
2
In Lecture 7, we studied in detail how light can be amplified a
AP4254
Fundamentals of Laser Optics
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
TA: ZHOU, Ziyao ([email protected])
2
Time and Venue
Time
Monday
09:00-09:50 (Tutorial)
& 10:00-11:50 (Lecture)
29 Aug
AP4254 Lecture 03
Particle Nature of Light
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
Introduction
Bohr Theory of the Hydrogen Atom.
Failures of the Classical Physics/Wave Theory of
Radiations.
The
AP4254 Lecture 09
Laser Resonators, Cavity Modes and
Gaussian Beams
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
In the previous lectures, we have studied two out of the three basic
components of a La
AP4254 Lecture 05
Radiation Transitions and Radiation in
Thermal Equilibrium
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
In Lecture 4, we dealt with energy levels of molecules and solids and
discusse
AP4254 Lecture 06
Emission Broadening, Linewidth, Gain and
Absorption
Course organization
CHU, Sai Tak
E-mail:
Tel:
Office:
[email protected]
3442-4968
G6762
Outline:
2
In Lecture 5, we presented the QM description of the natural emission
linewidth of