Solutions Manual For Quantum Theory of Materials By
Efthimios Kaxiras; John D. Joannopoulos
Wavelength - ANSWER: Distance between top of two crests (high point of wave)
Trough - ANSWER: Lowest point of a wave
Amplitude - ANSWER: Height of a wave
Electromagnetic radiation (EM) - ANSWER: Propagates through space as a wave
moving at the speed of light
wavelength equation - ANSWER: 1 x 10-9 m
Frequency units - ANSWER: Hertz (Hz) or 1/s, s-1
wavelength and frequency are - ANSWER: Inversely related, as one goes up the other
goes down
Different frequencies of light are - ANSWER: different colors of light
Long-wide wavelength - ANSWER: Low frequency, low energy
Short wavelength - ANSWER: high frequency, high energy
ROYGBIV - ANSWER: Red (low energy) 700 nm- violet (high energy) 380 nm
waves in order of increasing energy - ANSWER: Radio waves, radar, microwaves,
infrared, ultraviolet, x-rays, gamma rays
Mix visible light colors together - ANSWER: White light
Quantum - ANSWER: the minimum amount of energy that can be gained or lost by
an atom as it heats or cools
Light consists of energy packets called - ANSWER: photons
Einstein said - ANSWER: EM radiation has dual wave-particle nature called quantized
particles
Planck's constant - ANSWER: 6.626 x 10-34 J.s
atomic emission spectrum - ANSWER: the set of frequencies of the electromagnetic
waves emitted by atoms of the element
, Ground state - ANSWER: The lowest energy state of an atom
When atoms are excited - ANSWER: Atoms return to their ground state by emitting a
photon
White light is made up of - ANSWER: the colors of the visible spectrum
Passing white light through a prism - ANSWER: Separates it
Each element gives off its own - ANSWER: Characteristic colors which can identify the
atom
hydrogen atom emission spectrum - ANSWER: When current of electricity passed
thru has at low pressure, gas atoms increase from ground to excited then
immediately back to ground
Atoms jump - ANSWER: 1 or 2 levels creating photons
Bohr model of the atom - ANSWER: a dense, positively charged nucleus is
surrounded by electrons revolving around the nucleus in orbits with distinct energy
levels
Bohr Model-
Electrons move in...
An amount of...
Lowest allowable energy state... - ANSWER: Specific paths at different levels and can
jump from one level to another
Fixed energy separates one level from another
Ground state
According to Bohr, further away from the nucleus means - ANSWER: More energy
and their is no in between energy
A quantum of energy is the - ANSWER: Amount of energy required to move an e-
from one energy level to another
Balmer series - ANSWER: spectrum of light when an electron drops to energy level
n=2
Which element did Bohrs model only work for - ANSWER: H
DeBrogile's Hypothesis - ANSWER: E-s behave as energy waves and particles and
electrons propagate through space as an energy wave and are confined to the space
around the nucleus
Schrodinger's ... probability becomes the ... - ANSWER: 90%... electron cloud
Efthimios Kaxiras; John D. Joannopoulos
Wavelength - ANSWER: Distance between top of two crests (high point of wave)
Trough - ANSWER: Lowest point of a wave
Amplitude - ANSWER: Height of a wave
Electromagnetic radiation (EM) - ANSWER: Propagates through space as a wave
moving at the speed of light
wavelength equation - ANSWER: 1 x 10-9 m
Frequency units - ANSWER: Hertz (Hz) or 1/s, s-1
wavelength and frequency are - ANSWER: Inversely related, as one goes up the other
goes down
Different frequencies of light are - ANSWER: different colors of light
Long-wide wavelength - ANSWER: Low frequency, low energy
Short wavelength - ANSWER: high frequency, high energy
ROYGBIV - ANSWER: Red (low energy) 700 nm- violet (high energy) 380 nm
waves in order of increasing energy - ANSWER: Radio waves, radar, microwaves,
infrared, ultraviolet, x-rays, gamma rays
Mix visible light colors together - ANSWER: White light
Quantum - ANSWER: the minimum amount of energy that can be gained or lost by
an atom as it heats or cools
Light consists of energy packets called - ANSWER: photons
Einstein said - ANSWER: EM radiation has dual wave-particle nature called quantized
particles
Planck's constant - ANSWER: 6.626 x 10-34 J.s
atomic emission spectrum - ANSWER: the set of frequencies of the electromagnetic
waves emitted by atoms of the element
, Ground state - ANSWER: The lowest energy state of an atom
When atoms are excited - ANSWER: Atoms return to their ground state by emitting a
photon
White light is made up of - ANSWER: the colors of the visible spectrum
Passing white light through a prism - ANSWER: Separates it
Each element gives off its own - ANSWER: Characteristic colors which can identify the
atom
hydrogen atom emission spectrum - ANSWER: When current of electricity passed
thru has at low pressure, gas atoms increase from ground to excited then
immediately back to ground
Atoms jump - ANSWER: 1 or 2 levels creating photons
Bohr model of the atom - ANSWER: a dense, positively charged nucleus is
surrounded by electrons revolving around the nucleus in orbits with distinct energy
levels
Bohr Model-
Electrons move in...
An amount of...
Lowest allowable energy state... - ANSWER: Specific paths at different levels and can
jump from one level to another
Fixed energy separates one level from another
Ground state
According to Bohr, further away from the nucleus means - ANSWER: More energy
and their is no in between energy
A quantum of energy is the - ANSWER: Amount of energy required to move an e-
from one energy level to another
Balmer series - ANSWER: spectrum of light when an electron drops to energy level
n=2
Which element did Bohrs model only work for - ANSWER: H
DeBrogile's Hypothesis - ANSWER: E-s behave as energy waves and particles and
electrons propagate through space as an energy wave and are confined to the space
around the nucleus
Schrodinger's ... probability becomes the ... - ANSWER: 90%... electron cloud
