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Light of wavelength 548nm illuminates two slits, which are 1.7mm apart. A fringe pattern appears on...

Light of wavelength 548nm illuminates two slits, which are 1.7mm apart. A fringe pattern appears on a screen 3.3m from the slits.
What is the distance between dark fringe number 2 and dark fringe number 7?

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Answer #1

In a dual slits experiment the position of dark fring is given by :

So distance between the 7th and 2nd dark fring is:

Here,

D= distance between slits and screen

d= distance between slits

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