# Homework Help: Bragg Scattering Question

1. Sep 9, 2015

### RJLiberator

1. The problem statement, all variables and given/known data
Briefly describe how diffraction through a crystal lattice could be used to isolate a single wavelength from X-rays of many wavelengths.

2. Relevant equations
Bragg's equation: 2dsin(Θ)=n*λ

3. The attempt at a solution

Pretty fundamental question for the lab that I am about to go through. Instead of trying to just get by this answer, I wanted to come here and ask for some opinions and learn what I could.

Here's, so far, my early understanding:
At certain incident angles, and at certain wavelengths, diffraction through a crystal creates constructive interference. Using Braggs equation, we can then find the wavelength by plugging in the angle theta, d, and maxima.

2. Sep 14, 2015

### Greg Bernhardt

Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?

3. Sep 15, 2015

### SataSata

If I'm not wrong the Bragg's equation denotes the path difference between two waves being scattered by different atoms. So certain angle of incidence will cause certain wavelengths of X-rays to form destructive interference, leaving only the wavelength of X-rays that you want. I believe it is possible to calculate the required angle by using the Bragg's equation.

4. Sep 18, 2015

### KaranTheGreat

Bump. I thought I knew the answer but I was very far off.

5. Sep 18, 2015

### RJLiberator

Out of curiosity, what was it that you thought you knew, that turned out to be wrong?
This may motivate the conversation further. =)