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

De Broglie wavelength

  • Thread starter QueenFisher
  • Start date

QueenFisher

we were having a discussion about this in physics and my teacher mentioned a relationship between the formula and some angle (don't know which!) but it's not on the syllabus any more, i was wondering does anyone know anything about this?

cheers for the help
 

Chi Meson

Science Advisor
Homework Helper
1,767
10
Was there by any chance some mention of the "Compton effect"? Or was it mentioned in terms of x-rays? Or perhaps electron diffraction?

The deBroglie wavelength is used in may advanced physics applications; you'd have to give us some kind of clue here.
 

QueenFisher

well it must be something pretty simple as it's only AS level physics, it came up during a discussion about the photoelectric effect...
 

Chi Meson

Science Advisor
Homework Helper
1,767
10
My guess is that your teacher was talking about the Compton effect in which a photon collides with an electron. such a collision demonstrates the momentum of the photon since the electron recoils with a change in momentum. The photon (an x-ray) scatters at an angle theta according to the following formula:
[tex]\lambda '- \lambda=(h/mc)(1-cos \theta)[/tex]

the (h/mc) term is the "Compton wavelength" of the recoiling electron
 
Last edited:

Related Threads for: De Broglie wavelength

  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
6
Views
3K
  • Last Post
Replies
4
Views
561
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
3
Views
2K
Top