Why unequal fringe width in Michelson interference pattern?

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Discussion Overview

The discussion revolves around the phenomenon of unequal fringe width in the Michelson interference pattern, exploring potential causes and underlying principles. Participants examine theoretical aspects, equipment imperfections, and the mathematical formulation related to fringe width.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that unequal fringe width is due to imperfect equipment.
  • Another participant challenges this view, proposing that the fringe width can be described by the formula β=λ/2nθ, where n is the order of the fringe, and notes that textbooks do not adequately explain this relationship.
  • A later reply emphasizes the need for more detailed information to clarify the original question.
  • A participant provides a link to an external resource that includes an equation for circular fringes, which may relate to the discussion.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are competing views regarding the causes of unequal fringe width, with some attributing it to equipment imperfections and others referencing theoretical formulations.

Contextual Notes

The discussion highlights a lack of clarity in textbooks regarding the explanation of fringe width and its dependence on various factors, including the order of the fringe and the angle involved.

sree.
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why unequal fringe width in Michelson interference pattern?
 
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Welcome to PF;
If I understand you correctly - this is due to imperfect equipment.
 
Dear Simon,
I don't think it is due to apparatus imperfection. There is a formula for fringe width which is given by β=λ/2nθ, where n is the order of the fringe. but none of the textbook has given the explanation for this.
 
If you post a vague message, and come in once a month to update it with only minimal new information, it will take you a very long time to get your answer.
 
sree. said:
Dear Simon,
I don't think it is due to apparatus imperfection. There is a formula for fringe width which is given by β=λ/2nθ, where n is the order of the fringe. but none of the textbook has given the explanation for this.
Well then I clearly did not understand you. You will have to provide more information about what you are talking about.
 

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