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calculate the distance (in cm) between fringes for 694 nm light falling on double slits separated by 0.0250 mm,
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OSCOLPHYS2016 27.3.P.019.
Using the equation for the distance between fringes, $\Delta y = \frac{x\lambda}{d}$, calculate the distance (in cm) between fringes for 694 nm light falling on double slits separated by 0.0250 mm, located 3.60 m from a screen as in the figure.
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$\Delta y = \frac{x\lambda}{y}$
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