ratio of fringe width for bright and sark fringes
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the distance between two consecutive bright or dark fringes is known as fringe spacing.
fringe spacing=2L lemda÷d - L lemda÷d
fringe spacing=L lemda÷d (fringe spacing between first and second order bright fringe)
fringe spacing=3L lemda ÷2d- L lemda÷2d(fringe spacing between 1st and second order dark images )
fringe spacing=L lemda÷d
hope it helps u
fringe spacing=2L lemda÷d - L lemda÷d
fringe spacing=L lemda÷d (fringe spacing between first and second order bright fringe)
fringe spacing=3L lemda ÷2d- L lemda÷2d(fringe spacing between 1st and second order dark images )
fringe spacing=L lemda÷d
hope it helps u
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