Calculating Material Bandgap Using Quantum Theory

nanostar
Messages
3
Reaction score
0
Quantum theory says that the energy, E , (in eV) of a photon of wavelength λ is E = hc/eλ, where h is Planck's Constant, c is the velocity of light and e is the charge on an electron. Calculate the bandgap of a material which absorbs electrons shorter than 500nm.
 
Physics news on Phys.org
What are your thoughts on this?
 
This one's easy. Just plug in all the numbers and you have your bandgap. Then use the values for the next two parts to the question.
 

Thread 'Modeling a graph that shows age in relation to depth of an ice sample'

To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
View full post »

Similar threads

B Using Interference Principles to Increase the Efficiency of Solar Panels
Replies
0
Views
1K
Engineering What Is the Bandgap of a Semiconductor with Light Emission at 326.3 nm?
Replies
1
Views
1K
E<V Potential Step Confusion
Replies
7
Views
2K
"From your data, is the bandgap of ZnSe direct or indirect?"
Replies
6
Views
4K
Consider Compton scattering of a photon by a moving electron
Replies
1
Views
3K
QFT for Gifted Amateur - Problem 2.2
Replies
1
Views
2K
How Does Quantum Tunneling Affect Electron Confinement in Potential Wells?
Replies
9
Views
3K
A Is the Fenna-Matthews-Olson complex a quantum dot?
Replies
1
Views
1K
Calculating the Planck Length
Replies
3
Views
222
What is the energy imparted to each electron in Compton-scattering at 87.0°?
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top