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700 nm light passes through a single slit onto a screen 3.5m away. The 3'd dark fringe is 14 cm from the center line. How
700 nm light passes through a single slit onto a screen 3.5m away. The 3'd dark fringe is 14 cm from the center line. How wide is the slit? How many light fringes are visible on the screen if infinitely large. [5 marks]
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