How to Approach the First Exercise in Cohen-Tannoudji Volume 1?

  • Thread starter Thread starter daudaudaudau
  • Start date Start date
daudaudaudau
Messages
297
Reaction score
0
Hi. I'm trying to solve the very first exercise in Cohen-Tannoudji Volume 1, but I can't really get anywhere. Can someone give me a hint? This is not homework. We used Bransden and Joachain in the course I just finished, so I thought I'd take a look at Cohen now.
 

Attachments

  • cohen.jpg
    cohen.jpg
    64.7 KB · Views: 479
Physics news on Phys.org
This looks like a diffraction problem.
 
Redbelly98 said:
This looks like a diffraction problem.

I agree:

sin(θ)=pλ/l

here p=1

I don't know what to do with λ though...there must be some link between λ and energie...
keep in mind that the mass of a neutron is more like 1.67*10^-27 kg
 
Welcome to Physics Forums L'Aviateur :smile:

L'Aviateur said:
I don't know what to do with λ though...there must be some link between λ and energie...

Yes, indeed there is. But we do need to let the OP do some of the work here, in accordance with the Forum rules and guidelines :wink:
 

Thread 'Initial conditions for orbits around a wormhole'

Hi, I had an exam and I completely messed up a problem. Especially one part which was necessary for the rest of the problem. Basically, I have a wormhole metric: $$(ds)^2 = -(dt)^2 + (dr)^2 + (r^2 + b^2)( (d\theta)^2 + sin^2 \theta (d\phi)^2 )$$ Where ##b=1## with an orbit only in the equatorial plane. We also know from the question that the orbit must satisfy this relationship: $$\varepsilon = \frac{1}{2} (\frac{dr}{d\tau})^2 + V_{eff}(r)$$ Ultimately, I was tasked to find the initial...
View full post »

Thread 'Help to convert units of a simple formula'

The value of H equals ## 10^{3}## in natural units, According to : https://en.wikipedia.org/wiki/Natural_units, ## t \sim 10^{-21} sec = 10^{21} Hz ##, and since ## \text{GeV} \sim 10^{24} \text{Hz } ##, ## GeV \sim 10^{24} \times 10^{-21} = 10^3 ## in natural units. So is this conversion correct? Also in the above formula, can I convert H to that natural units , since it’s a constant, while keeping k in Hz ?
View full post »

Similar threads

Need help A problem with Cohen Tannoudji's book
Replies
2
Views
3K
Particle in a cylindrically symmetric potential (Quantum mechanics)
Replies
5
Views
2K
Quantum Mechanics: Base on which an operator is given
Replies
5
Views
2K
Quantum Intermediate-level QM book aimed on foundational issues
Replies
2
Views
2K
Beam Expansion: Distance between 2 lenses in a Keplerian beam expander
Replies
0
Views
1K
How Does Acceleration Transform in Special Relativity?
Replies
13
Views
4K
Quantum Which Intermediate Quantum Mechanics Textbook Covers Specific Topics Best?
Replies
4
Views
3K
Other Can I (with a math major) do a masters in theoretical physics?
Replies
16
Views
2K
QM mechanics book for review and reference
Replies
2
Views
5K
Overlap integral of hydrogen molecule
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top