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

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Homework Help Overview

The discussion revolves around the first exercise in Cohen-Tannoudji Volume 1, which appears to involve concepts related to diffraction. The original poster expresses difficulty in progressing with the problem and seeks hints rather than direct solutions.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants identify the problem as related to diffraction and discuss the relationship between the variables involved, such as the wavelength (λ) and energy. There is uncertainty about how to connect these concepts effectively.

Discussion Status

Some participants have offered insights regarding the nature of the problem and have pointed out the need for the original poster to engage with the material. There is a recognition of the link between wavelength and energy, but no consensus has been reached on how to proceed.

Contextual Notes

The original poster has recently completed a course using Bransden and Joachain and is now exploring Cohen-Tannoudji, indicating a transition in their study materials. There is mention of specific values, such as the mass of a neutron, which may be relevant to the discussion.

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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.
 

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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:
 

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