Understanding the Relationship Between Glancing Angle & Deviation Angle

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SUMMARY

The discussion focuses on the relationship between the glancing angle and the deviation angle in X-ray diffraction. The glancing angle is defined as the angle between the incident X-ray beam and the atomic plane, while the deviation angle represents the angle between the original ray and the reflected ray. A specific case is presented where the glancing angle is calculated to be 25.25 degrees, despite an initial assumption of 0 degrees due to the atomic plane being parallel to the X-ray. The need for clearer diagrams to illustrate these relationships is emphasized.

PREREQUISITES
  • Understanding of X-ray diffraction principles
  • Familiarity with glancing angle and deviation angle concepts
  • Basic knowledge of atomic planes in crystallography
  • Ability to interpret diagrams related to X-ray interactions
NEXT STEPS
  • Research the mathematical relationship between glancing angle and deviation angle in X-ray diffraction
  • Study the principles of Bragg's Law and its application in X-ray crystallography
  • Learn how to create and interpret diagrams for X-ray diffraction setups
  • Explore software tools for simulating X-ray diffraction patterns
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Students and professionals in physics, materials science, and chemistry who are studying X-ray diffraction and its applications in analyzing crystal structures.

gxc9800
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Homework Statement


in the first photo , the direction of x-ray and the atomic plane are shown.
whereas for the 2nd photo , the
the direction of x-ray and the atomic plane are not shown... so i would assume the glancing angle = 0 . beacuse the atomic plane is parallel to the x-ray ...but in the solution , the glancing angle is 25.25

can someone please draw me a better diagram to show the relationship between the glancing angle( angle betww and deviation angle( deviation of X-ray from the original direction) ...

Homework Equations

The Attempt at a Solution

 

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gxc9800 said:

Homework Statement


in the first photo , the direction of x-ray and the atomic plane are shown.
whereas for the 2nd photo , the
the direction of x-ray and the atomic plane are not shown... so i would assume the glancing angle = 0 . beacuse the atomic plane is parallel to the x-ray ...but in the solution , the glancing angle is 25.25

The deviation angle is the angle between the original ray and the reflected ray. Look at the first photo: how are the deviation angle and the glancing angle related?
The second photo shows the deviation angle. From the relation above, what is the glancing angle? Where is the atomic plane?

ehild
 

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