Optics
Fringe Spacing
The spacing between adjacent bright (or dark) fringes in double-slit interference.
Variables
\Delta ym
Fringe spacing
\lambdam
Wavelength
Lm
Distance to screen
dm
Slit separation
Your notes
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Common questions
What is the Fringe Spacing formula?
Fringe Spacing is written Δy = λL/d. The spacing between adjacent bright (or dark) fringes in double-slit interference. It belongs to Optics, under Wave Optics.
What are the units in Δy = λL/d?
In SI units, \Delta y is fringe spacing, measured in m; \lambda is wavelength, measured in m; L is distance to screen, measured in m; d is slit separation, measured in m.