Why unequal fringe width in Michelson interference pattern?

[sree.]

why unequal fringe width in Michelson interference pattern?

 

[Simon Bridge]

Welcome to PF;
If I understand you correctly - this is due to imperfect equipment.

 

[sree.]

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.

 

[Vanadium 50]

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.

 

[Simon Bridge]

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.

 

[jtbell]

http://www.phy.davidson.edu/stuhome/cabell_f/diffractionfinal/pages/michelson.htm

see the equation for circular fringes about half way down the page.