(Solid state and atom physics)
The structure of a carbon crystal and a silicon crystal are...
(Solid state and atom physics)
The structure of a carbon crystal and a silicon crystal are the
same. Why is the carbon crystal transparent and the silicon crystal
is not?
Silicon has a diamond crystal structure with lattice constant of
a= 0.543 nm and molar mass of 28.08 g/mole. (12 points) a) Explain
in brief the position of silicon atoms in the unit cell and deduce
the corresponding Bravais lattice and state the equivalent
positions b) Calculate the density of silicon in g/cm3. c)
Calculate the number of silicon atoms per square centimeter (# Si
atoms/cm2) on the (100) and (111) faces
Calculate the radius of an iridium atom, given that Ir has an
FCC crystal structure, a density of 22.4
g/cm3 , and an atomic weight of 192.2
g/mol and NA = 6.022 x
1023.
Do the calculations with 5 significant
digits.
Calculate the radius of an iridium atom, given that Ir has an
FCC crystal structure, a density of 22.4
g/cm3 , and an atomic weight of 192.2
g/mol and NA = 6.022 x
1023.
Do the calculations by using 4 digits.
Modern Physics: Solid State and Nuclear
Physics
You want to use the Hall Effect to determine if a particular
sample of a semiconductor is n or p doped.
a. Sketch the following configuration: the sample is placed flat
on the page. The applied voltage source is attached such that the
positive lead is nearest to the top of the page, and the negative
near the bottom. The magnetic field goes into the page. Identify on
your drawing the direction of...
For each molecule:
draw the Lewis structure, state the hybridization of the central
atom, state the electron and molecular geometry and draw a 3D
representation of the geometry.
a. IF3
b. BF3
Solid-state physics, Band gap
a, How does the size of the band gap depend on the strength of
the periodic potential?
b, Which type of material would you expect to have the stronger
periodic potential, a metal or an insulator? Why?
Please explain thoroughly
(about solid state physics, optical
communication)
The main principle of optical communication is the concept of total
reflection. I wonder if the total reflection is based on particle
property of light, or wave property of it.
The total reflection is the concept of refraction and
reflection. I know that refraction and reflection of light are all
properties that correspond to the particle and wave of light.(I
mean, Particle property of light can explain refraction and
reflection, and Wave property of...
Solid-state physics
a, How many electrons are needed to fill all states in a
band?
b, What is the meaning of the Fermi energy?
c, What is the Fermi surface of a metal?
Please explain thoroughly