### Calculate how many fringes are visible on the screen

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##### Reference no: EM13521121

A double slit is opposite the center of a 1.7-m wide screen 1.9 m from the slits. The slit separation is 24 µm and the width of each slit is 7.2 µm. How many fringes are visible on the screen if the slit is illuminated by 648-nm light?

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