• Support PF! Buy your school textbooks, materials and every day products Here!

Density of states of ideal gas and photon gas

  • Thread starter ausdreamer
  • Start date
  • #1
23
0

Homework Statement



I know how to derive the density of states for an ideal gas by using the energy equation:

E_n = A*n^2, where A = (h_bar^2*pi^2)/(2mL^2)

but what about for a 'photon gas'? Do I use the same energy equation as above, or the following:

E_n = (h_bar*pi*c/L)*n

Homework Equations





The Attempt at a Solution



I think I'd use the second equation, but solutions to the assignment said use the first equation. I'm confused!
 

Answers and Replies

  • #2
Simon Bridge
Science Advisor
Homework Helper
17,847
1,644
Regular gas in a box derivation.
Note: photons are Bosons and massless with two spin states.
 
Last edited:
  • #3
23
0
Thanks, this helped a lot :)
 

Related Threads on Density of states of ideal gas and photon gas

  • Last Post
Replies
3
Views
2K
Replies
4
Views
5K
Replies
1
Views
5K
Replies
7
Views
2K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
3
Views
7K
Replies
2
Views
2K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
0
Views
4K
Top