Summary
- Band theory of solids
- Semiconductors
- Class quiz

- Semiconductor devices
- p-n junctions
- diodes
- transistors
- light emitting diodes
- photovoltaics
- integrated circuits
- Moore's Law
Example #1


- The nucleus
gc6 29.tb11
In its lowest quantum state, a diatomic quantum mechanical rotator has a rotational energy of
A. zero
B.
C.
D. 
Answer
gc6 29.23
What bandgap do you need to produce an LED that emits at λ = 515 nm?
A. 2.41 eV
B. 1.91 eV
C. 1.24 eV
D. 5.15 eV
Answer
gc6 30.q2
What isotope is represented by the X in
?
A. xenon-82
B. lead-38
C. strontium-38
D. strontium-82
Answer
A. zero
The lowest rotational energy level corresponds to L = 0.
A. 2.41 eV
D. strontium-82
The number at the lower left is the atomic number Z and identifies
the isotope as strontium. The number at the upper left is the atomic number A and it tells you the
number of nucleons is 82.
Moore's Law
