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# Diffraction Experiments - Fringes vs Maxima? watch

1. Hi,
Just a quick question regarding some terminology,
I see the terms maxima and fringes used fairly interchangeably when used to describe/explain diffraction patterns for single slit/double slit/diffraction gratings.
What is the actual difference between them?
Thanks
2. (Original post by HasanRaza1)
Hi,
Just a quick question regarding some terminology,
I see the terms maxima and fringes used fairly interchangeably when used to describe/explain diffraction patterns for single slit/double slit/diffraction gratings.
What is the actual difference between them?
Thanks
So at maxima constructive interference occurs, where we have maximal amplitude and therefore maximal intensity. We have a path difference of n * lambda here.

Fringes are the result of interference. However, we have 2 types of fringes in the interference experiments, which are bright and dark fringes. At minima (destructive interference; path difference of n + n/2 lambda) we get dark fringes. At maxima, we get bright fringes.
3. Ok that makes sense! So maxima and minima are essentially distinct points on the fringes, of defined path difference. Thank you very much for your time
4. (Original post by HasanRaza1)
Ok that makes sense! So maxima and minima are essentially distinct points on the fringes, of defined path difference. Thank you very much for your time
You're correct and no problem

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