Scherrer's Equation: Theta Units Explained

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Discussion Overview

The discussion centers around the units of theta in Scherrer's equation, specifically whether theta is measured in degrees or radians. The context involves the application of this equation in analyzing X-ray diffraction (XRD) results.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant questions whether theta in Scherrer's equation is in degrees or radians.
  • Another participant clarifies that it is not theta itself but rather cos(theta) that is relevant in the equation.
  • A participant expresses confusion about the measurement of theta, suggesting it might be in degrees.
  • There is a reiteration of the importance of understanding the cosine function in this context.
  • A participant mentions analyzing XRD results and needing theta for calculating FWHM.
  • Responses indicate that some participants believe the answer to the original question should be known by those familiar with the cosine function.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether theta is in degrees or radians, and the discussion remains unresolved regarding the units of measurement.

Contextual Notes

There is a lack of clarity on the assumptions regarding the use of degrees versus radians in the context of Scherrer's equation, and the discussion does not resolve this ambiguity.

Humaira Khalil
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hi
is theta used in degree or radians in Scherrer's equation..
 
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What appears is not ##\theta## but ##\cos \theta##. It should be rather clear how this is to be interpreted.
 
we need to take cosine of "THETA". Is it measured in degrees or radian,,, what is think is theta is in degrees, but confused...
 
Do you understand what the cosine function does?
 
Orodruin said:
Do you understand what the cosine function does?
YESS! actually I'm analyzing XRD results, from Origin Software... to find FWHM this theta is required...
 
Humaira Khalil said:
YESS!
Then you should already know the answer to your question.
 
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Orodruin said:
Then you should already know the answer to your question.
thanks :wink:
 

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